| Dec 31, 2010 | Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 1,039 | 642 | 1,032 | 298 | 91 |
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| Net Income | 190 | 314 | 332 | 841 | 526 | 800 | 570 | 562 | 713 | 652 | 1,019 | 632 | 1,021 | 291 | 84 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 677 | 709 | 742 | 824 | 880 |
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| Depreciation and amortization | 338 | 439 | 454 | 565 | 629 | 640 | 694 | 618 | 646 | 678 | 684 | 717 | 750 | 831 | 887 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 14 |
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| Impairment loss | - | - | - | - | - | - | 2 | - | 12 | 24 | - | - | - | - | 14 |
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| Amortization of right of use assets - operating leases | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 2 | 2 |
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| Amortization of sales type lease | - | - | - | - | - | - | - | - | - | - | - | -8 | - | - | 1 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 44 | 51 | 52 | 51 | 44 |
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| Non-cash compensation expense | 33 | 30 | 30 | 45 | 28 | 29 | 33 | 35 | 40 | 41 | 44 | 51 | 52 | 51 | 44 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 85 | -3 | -60 | -240 | -343 |
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| Loss from unconsolidated joint ventures | 37 | 86 | 49 | 75 | 13 | 23 | 8 | 11 | 2 | 47 | -85 | -3 | -60 | -240 | -343 |
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| Gain on sale of investment in unconsolidated joint venture | - | - | - | - | - | - | 59 | - | - | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 32 | 22 | 27 | 25 | 34 |
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| Proceeds from Equity Method Investment, Distribution | 17 | 40 | 47 | 33 | 7 | 8 | 25 | 27 | 7 | 17 | 32 | 22 | 27 | 25 | 34 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 5 | 6 | -6 | 6 | 4 |
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| (Gains) losses from investments in securities | 1 | -0 | 1 | 3 | 1 | -1 | 2 | 4 | -2 | 6 | 5 | 6 | -6 | 6 | 4 |
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| Provision for Loan and Lease Losses | - | - | - | - | - | - | - | - | - | - | 2 | -1 | -0 | 0 | 0 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 23 | 23 | 26 | 31 | 37 |
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| Paid-in-Kind Interest | 56 | 55 | 43 | 3 | -39 | -42 | -35 | -1 | 21 | 22 | 23 | 23 | 26 | 31 | 37 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | -45 | - | - | - |
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| Loss from early extinguishment of debt | -90 | -1 | -4 | 0 | -11 | -22 | -0 | 0 | -16 | -30 | - | -45 | - | - | - |
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| Other Income - assignment fee | - | - | - | - | - | - | - | - | - | - | - | - | 7 | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 632 | 125 | 441 | 1 | 1 |
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| Gains on sales of real estate | - | - | - | - | - | - | - | - | - | - | 619 | 124 | 437 | 1 | 1 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | - | 10 | - | - |
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| Gain on sales-type lease | - | - | - | - | - | - | - | - | - | - | - | - | 10 | - | - |
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| Unrealized (Gain) Loss on non-real estate Investments | - | - | - | - | - | - | - | - | - | - | - | - | -0 | 0 | 1 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | -23 | -5 | 8 | 31 | -14 |
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| Tenant and other receivables, net | 5 | 19 | -23 | 0 | -13 | 46 | -4 | -2 | -29 | 25 | -23 | -5 | 8 | 31 | -14 |
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| Notes receivable, net | - | - | - | - | - | - | - | - | - | - | 0 | 1 | 0 | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 97 | 102 | 98 | 100 | 98 |
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| Accrued rental income, net | - | - | 77 | 60 | 58 | 74 | 28 | 58 | 44 | 57 | 97 | 102 | 98 | 100 | 98 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | -12 | 21 | -20 | 7 | 5 |
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| Prepaid expenses and other assets | -3 | 39 | -7 | -13 | -20 | 17 | -53 | -51 | -12 | -3 | -12 | 21 | -20 | 7 | 5 |
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| Finance Lease, Interest Payment on Liability | - | - | - | - | - | - | - | - | - | - | -1 | - | - | - | - |
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| Increase (Decrease) in Prepaid Rent | - | - | - | - | - | - | - | - | - | - | - | - | - | -26 | -1 |
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| Lease liabilities - operating leases | - | - | - | - | - | - | - | - | - | - | -2 | 24 | -0 | 0 | 0 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | -4 | 20 | -23 | 42 | -2 |
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| Accounts payable and accrued expenses | -33 | 7 | 4 | 13 | 4 | -6 | 16 | 10 | 1 | 13 | -4 | 20 | -23 | 42 | -2 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 16 | -11 | 9 | 30 | -6 |
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| Accrued interest payable | -14 | 7 | 3 | 21 | -4 | 27 | 54 | -161 | 5 | 1 | 16 | -11 | 9 | 30 | -6 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 18 | -29 | -24 | 7 | 13 |
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| Other liabilities | -9 | 7 | 1 | 2 | -58 | -34 | -106 | -45 | 5 | -50 | 18 | -29 | -24 | 7 | 13 |
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| Tenant leasing costs | - | - | - | - | - | - | - | - | - | - | -80 | -63 | 84 | 78 | 119 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 118 | 491 | 250 | 1,003 | 1,144 |
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| Total adjustments | 186 | 293 | 311 | -64 | 169 | -1 | 467 | 345 | 438 | 529 | 138 | 501 | 262 | 1,010 | 1,150 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 1,157 | 1,133 | 1,282 | 1,302 | 1,235 |
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| Net cash provided by operating activities | 376 | 606 | 643 | 778 | 696 | 799 | 1,037 | 907 | 1,150 | 1,181 | 1,157 | 1,133 | 1,282 | 1,302 | 1,235 |
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| Acquisitions of real estate | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -35 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 483 | 514 | 500 | 526 | 651 |
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| Construction in progress | - | - | - | - | - | - | 500 | 608 | 695 | 546 | 483 | 514 | 500 | 526 | 651 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 160 | 151 | 177 | 171 | 190 |
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| Building and other capital improvements | - | 62 | 50 | 74 | 82 | 113 | 151 | 222 | 190 | 181 | 160 | 151 | 177 | 171 | 190 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 234 | 264 | 219 | 311 | 258 |
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| Tenant improvements | - | -76 | 140 | 105 | 106 | 145 | 230 | 205 | 210 | 252 | 234 | 264 | 219 | 311 | 258 |
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| Right of use assets - finance leases | - | - | - | - | - | - | - | - | - | 5 | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 519 | 180 | 835 | 1 | 1 |
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| Proceeds from sales of real estate | - | - | 62 | 250 | 420 | 603 | 123 | 30 | 455 | 91 | 519 | 180 | 835 | 1 | 1 |
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| Acquisition of real estate upon consolidation of unconsolidated joint ventures (net of cash) | - | - | - | - | - | - | - | - | - | - | - | - | - | 13 | -6 |
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| Proceeds from assignment fee | - | - | - | - | - | - | - | - | - | - | - | - | 7 | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 172 | 98 | 278 | 193 | 132 |
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| Capital contributions to unconsolidated joint ventures | 63 | 18 | 6 | - | 52 | 38 | 576 | 109 | 346 | 87 | 172 | 98 | 278 | 193 | 132 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 55 | 0 | 37 | 33 | 28 |
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| Capital distributions from unconsolidated joint ventures | - | - | - | - | - | - | 20 | 251 | - | 137 | 55 | 0 | 37 | 33 | 28 |
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| Cash and cash equivalents deconsolidated | - | - | - | - | - | - | - | - | - | 24 | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | 18 | - | - | - |
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| Proceeds from Sale of Equity Method Investments | 50 | 141 | 4 | 226 | 1 | 25 | 56 | - | - | - | - | 18 | - | - | - |
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| Investment in non-real estate investments | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 2 | 3 |
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| Issuance of note receivables (including related party) | - | - | - | - | - | - | - | - | - | - | - | - | - | 12 | 3 |
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| Proceeds from note receivable | - | - | - | - | - | - | - | - | - | - | 6 | 10 | 10 | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | -3 | -1 | 5 | -1 | -0 |
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| Investments in securities, net | - | - | 1 | 2 | 2 | 2 | 1 | 2 | 1 | 2 | -3 | -1 | 5 | -1 | -0 |
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| Deposit on capital lease | - | - | - | - | - | - | - | - | 14 | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | -614 | -1,040 | -1,603 | -1,194 | -1,237 |
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| Net cash used in investing activities | -1,161 | -90 | -1,278 | -533 | -665 | -280 | -1,329 | -898 | -1,099 | -1,015 | -614 | -1,040 | -1,603 | -1,194 | -1,237 |
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| Proceeds from Secured Notes Payable | - | - | - | - | - | - | - | - | - | - | - | 1,201 | - | 600 | - |
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| Proceeds from mortgage notes payable | 269 | 1,178 | - | - | - | - | - | 2,300 | - | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 17 | 832 | - | - | 5 |
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| Repayments of mortgage notes payable | 730 | 1,252 | 254 | 80 | 88 | 55 | 1,327 | 1,318 | 19 | 46 | 17 | 832 | - | - | 5 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 1,248 | 1,696 | 750 | 748 | 850 |
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| Proceeds from unsecured senior notes | 1,543 | 848 | 998 | 1,195 | - | - | 1,990 | 848 | 996 | 1,548 | 1,248 | 1,696 | 750 | 748 | 850 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | 1,842 | - | 500 | 700 |
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| Redemption of unsecured senior notes | 700 | - | 224 | - | 548 | - | - | 848 | 700 | 699 | - | 1,842 | - | 500 | 700 |
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| Redemption/repurchase of unsecured exchangeable senior notes | 219 | 45 | 507 | 393 | 655 | - | - | - | - | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 265 | 770 | 985 | - | - |
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| Proceeds from Lines of Credit | - | - | - | - | - | - | 25 | 580 | 745 | 380 | 265 | 770 | 985 | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 265 | 625 | 1,130 | - | - |
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| Repayments of unsecured line of credit | - | - | - | - | - | - | 25 | 535 | 790 | 380 | 265 | 625 | 1,130 | - | - |
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| Proceeds from Other Debt | - | - | - | - | - | - | - | - | - | - | - | -500 | 730 | 1,200 | - |
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| Payments for Repurchase of Redeemable Preferred Stock | - | - | - | - | - | - | - | - | - | - | - | 200 | - | - | - |
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| Repayments of mezzanine notes payable | - | - | - | - | - | - | - | 306 | - | - | - | - | - | - | - |
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| Payments on finance lease obligations | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | 13 |
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| Repayment of unsecured term loan | - | - | - | - | - | - | - | - | - | - | - | - | - | -730 | 500 |
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| Proceeds from Issuance of Commercial Paper | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5,363 |
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| Repayments of Commercial Paper | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 4,863 |
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| Repayments of outside members’ notes payable | - | - | - | - | - | - | - | 70 | - | - | - | - | - | - | - |
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| Payments on capital lease obligations | - | - | - | - | - | - | 1 | 0 | 1 | - | - | - | - | - | - |
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| Payments on real estate transaction | - | - | - | - | 0 | 3 | 5 | 3 | 1 | - | - | - | - | - | - |
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| Deposit on mortgage note payable interest rate lock | - | - | - | - | - | - | - | 23 | - | - | - | - | - | - | - |
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| Proceeds from (Payments for) Other Financing Activities | - | - | - | - | - | - | - | 23 | - | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 10 | 21 | 8 | 19 | 12 |
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| Deferred financing costs | 16 | 16 | 8 | 15 | 0 | 2 | 16 | 51 | 8 | 13 | 10 | 21 | 8 | 19 | 12 |
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| Debt Issuance Costs | - | - | - | - | - | - | - | - | - | - | - | -16 | - | - | - |
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| Payment for Debt Extinguishment or Debt Prepayment Cost | - | - | - | - | - | - | - | - | - | - | - | 43 | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 3 | 24 | -0 | 0 | -2 |
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| Net activity from equity transactions | 23 | 10 | 0 | -0 | 2 | 1 | -0 | 0 | -1 | 14 | 3 | 24 | -0 | 0 | -2 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 689 | 684 | 685 | 688 | 690 |
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| Dividends and distributions | 325 | 333 | 373 | 451 | 840 | 1,226 | 672 | 527 | 588 | 666 | 689 | 684 | 685 | 688 | 690 |
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| Proceeds from Noncontrolling Interests | - | - | - | - | - | - | - | - | - | - | 8 | 18 | 1 | 227 | 375 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 59 | 260 | 86 | 70 | 78 |
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| Distributions to noncontrolling interests in property partnerships | 25 | - | 6 | 10 | 37 | 173 | 55 | 54 | 83 | 70 | 59 | 260 | 86 | 70 | 78 |
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| Proceeds from (Payments to) Noncontrolling Interests | - | - | - | - | - | - | - | - | 47 | -187 | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 484 | -1,311 | 556 | 768 | -274 |
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| Net cash provided by (used in) financing activities | -185 | 828 | -146 | 1,078 | -632 | -1,559 | -75 | 68 | 82 | -113 | 484 | -1,311 | 556 | 768 | -274 |
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| Net increase (decrease) in cash and cash equivalents and cash held in escrows | - | - | - | - | - | - | - | - | - | - | 1,027 | -1,218 | 236 | 876 | -277 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 433 | 465 | 450 | 554 | 676 |
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| Cash paid for interest | 394 | 386 | 481 | 548 | 647 | 482 | 434 | 598 | 416 | 439 | 433 | 465 | 450 | 554 | 676 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 54 | 53 | 52 | 43 | 42 |
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| Interest capitalized | 41 | 48 | 44 | 68 | 52 | 34 | 39 | 61 | 66 | 55 | 54 | 53 | 52 | 43 | 42 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 99 | 238 | 120 | 134 | 112 |
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| Write-off of fully depreciated real estate | - | - | - | - | - | - | -207 | -125 | 135 | 130 | 99 | 239 | 120 | 135 | 112 |
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| Capital Expenditures Incurred but Not yet Paid | - | - | - | - | - | - | - | - | - | - | 20 | 25 | 98 | 4 | -51 |
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| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | - | - | - | - | - | - | - | - | - | - | - | 27 | - | 141 | 31 |
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| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | - | - | - | - | - | - | - | - | - | - | - | - | - | 163 | - |
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| Finance Lease, Liability, Reversal from Re-Assessment | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -38 |
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| Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment | - | - | - | - | - | - | - | - | - | - | - | - | - | - | -29 |
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| Contribution of Property | - | - | - | - | - | - | - | - | - | - | - | - | - | 18 | 93 |
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| Capitalized operating lease costs | - | - | - | - | - | - | - | - | - | - | - | - | - | 13 | 30 |
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| Construction in progress from prepaid expenses and other assets | - | - | - | - | - | - | - | - | - | - | - | - | - | 26 | - |
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| Investment in unconsolidated joint ventures eliminated upon consolidation | - | - | - | - | - | - | - | - | - | - | - | - | - | 184 | -12 |
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| Loans Assumed | - | - | - | - | - | - | - | - | - | - | - | - | - | 300 | 207 |
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| Debt Conversion, Converted Instrument, Amount | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 100 |
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| Fair Value of Assets Acquired | - | - | - | - | - | - | - | - | - | - | - | - | - | -491 | -220 |
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| Interest rate swaps recorded upon consolidation | - | - | - | - | - | - | - | - | - | - | - | - | - | -7 | - |
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| Construction in progress, net deconsolidated | - | - | - | - | - | - | - | - | - | - | - | -300 | -11 | - | - |
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| Transfer to Investments | - | - | - | - | - | - | - | - | - | - | 348 | 107 | 11 | - | - |
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| Sales-type lease origination | - | - | - | - | - | - | - | - | - | - | - | - | 13 | - | - |
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| Derecognition of assets in exchange for sales-type lease obligation | - | - | - | - | - | - | - | - | - | - | - | - | -3 | - | - |
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| Accrued rental income, net deconsolidated | - | - | - | - | - | - | - | - | - | - | 5 | - | - | - | - |
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| Prepaid rent reclassified to right of use asset | - | - | - | - | - | - | - | - | - | 15 | - | - | - | - | - |
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| Transfer Of Tenant Lease Costs Real Estate | - | - | - | - | - | - | - | - | - | - | 3 | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 112 | - | - | - | - |
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| Real Estate Owned, Transfer from Real Estate Owned | - | - | - | 8 | - | - | - | - | - | 13 | 112 | - | - | - | - |
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| Transfer Of Tenant Improvements Real Estate | - | - | - | - | - | - | - | - | - | - | 12 | - | - | - | - |
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| Prepaid expenses and other assets, net deconsolidated | - | - | - | - | - | - | - | - | - | - | - | -5 | - | - | - |
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| Assumption of mortgage notes payable | - | - | - | - | - | - | - | - | - | - | - | 200 | - | - | - |
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| Mortgage Notes Payable Deconsolidated | - | - | - | - | - | - | - | - | - | - | - | -198 | - | - | - |
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| Other Significant Noncash Transaction, Value of Consideration Given | - | - | - | - | - | - | - | - | - | - | - | 100 | - | - | - |
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| Lease liability - finance lease deconsolidated | - | - | - | - | - | - | - | - | - | -120 | - | - | - | - | - |
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| Debt Conversion, Original Debt, Amount | - | - | - | - | - | - | - | 110 | - | - | - | - | - | - | - |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | 30 | 18 | 7 | 4 | 41 |
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| Conversions of noncontrolling interests to stockholders’ equity | 17 | 85 | -35 | -30 | -3 | 14 | 6 | 17 | 3 | 5 | 30 | 18 | 7 | 4 | 41 |
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| Boston Properties Limited Partnership | - | - | - | - | - | - | - | - | - | - | - | - | 48 | 48 | 43 |
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| Issuance of restricted securities to employees and directors | 19 | 25 | 26 | 30 | 27 | 43 | 34 | 36 | 37 | 38 | 43 | 44 | 48 | 48 | 43 |
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