| 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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| Net income | 111 | 87 | 205 | 346 | 124 | 204 | 250 | 769 | 766 | -703 | -222 | 455 | 220 | 1,296 |
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| (Gains) losses on sales of real estate and other | - | - | - | - | - | - | - | 772 | 723 | -36 | 414 | 263 | 18 | 1,245 |
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| Depreciation and amortization | - | - | - | - | - | - | - | - | 329 | 310 | 310 | 426 | 397 | 333 |
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| Amortization of share awards | - | - | - | 52 | 26 | 26 | 32 | 28 | 35 | 28 | 59 | 61 | 75 | 64 |
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| Amortization of operating lease right-of-use assets | - | - | - | - | - | - | - | - | - | - | - | 35 | 42 | 36 |
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| Deferred income taxes | -137 | 65 | -7 | -28 | -103 | -3 | 47 | -33 | 28 | -59 | 200 | -259 | -125 | -123 |
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| Asset impairments | - | - | - | - | - | - | - | 47 | 18 | 62 | 8 | 38 | 30 | 213 |
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| Equity (earnings) losses from unconsolidated hospitality ventures | - | -22 | -1 | 25 | -64 | 68 | 220 | 8 | -10 | -70 | 28 | 5 | -1 | 31 |
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| Contra revenue | - | - | - | - | - | - | - | - | - | 30 | 35 | 31 | 47 | 69 |
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| Unrealized (gains) losses, net | -13 | - | - | - | - | - | - | - | - | - | - | -55 | 36 | 53 |
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| Contingent consideration liability fair value adjustment | - | - | - | - | - | - | - | - | -30 | -1 | - | - | 9 | -39 |
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| Payments for key money assets | - | - | - | - | - | - | - | - | - | - | - | - | - | 153 |
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| Other | 32 | 28 | -12 | -38 | - | - | - | 22 | -55 | -27 | -34 | -92 | -54 | 78 |
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| Receivables, net | -17 | -33 | 9 | 28 | -29 | 14 | 37 | -14 | 29 | -133 | 85 | 209 | - | 15 |
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| Prepaid income taxes | -6 | 8 | -16 | 53 | 16 | -21 | -14 | 5 | -10 | 241 | -255 | -2 | 24 | -65 |
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| Prepaids and other assets | - | - | - | - | - | - | - | - | - | - | 54 | 114 | 66 | 116 |
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| Other long-term assets | - | - | - | - | - | - | - | - | - | - | - | 110 | 92 | 6 |
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| Increase (Decrease) in Accounts Payable and Accrued Liabilities | 10 | 81 | 71 | 186 | -7 | 7 | 95 | -80 | 26 | -249 | 87 | 96 | -29 | 56 |
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| Contract liabilities | - | - | - | - | - | - | - | - | - | 73 | 213 | 491 | 492 | 48 |
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| Deferred revenue related to the loyalty program | - | - | - | - | - | - | - | - | - | - | - | - | - | 203 |
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| Operating lease liabilities | - | - | - | - | - | - | - | - | - | - | -25 | -35 | -43 | -35 |
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| Accrued compensation and benefits | 5 | 22 | -5 | -9 | 5 | 7 | 22 | 6 | -1 | -47 | 33 | 46 | -22 | -6 |
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| Other long-term liabilities | - | - | -6 | -19 | 1 | 10 | 24 | 51 | 73 | -27 | -25 | - | -13 | -6 |
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| Net cash provided by operating activities | - | - | 456 | - | - | - | 620 | 341 | 396 | -611 | 315 | 674 | 800 | 633 |
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| Purchases of marketable securities and short-term investments | - | - | - | - | - | - | - | 665 | 350 | 1,143 | 793 | 952 | 483 | 1,775 |
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| Proceeds from marketable securities and short-term investments | - | - | - | - | - | - | - | 624 | 349 | 542 | 1,240 | 1,060 | 576 | 1,338 |
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| Contributions to equity method and other investments | - | - | - | - | - | - | - | 60 | 48 | 65 | 29 | 8 | 43 | 88 |
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| Return of equity method and other investments | - | - | - | - | - | - | - | 51 | 28 | 5 | 98 | 54 | 7 | 62 |
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| Acquisitions, net of cash acquired | 716 | 233 | 814 | 548 | 3 | 492 | 259 | 678 | 18 | - | 2,916 | 174 | 175 | 609 |
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| Capital expenditures | 331 | 301 | 232 | 253 | 269 | 211 | 298 | 297 | 369 | 122 | 111 | 201 | 198 | 170 |
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| Issuance of financing receivables | - | - | - | - | - | - | - | - | - | - | - | 25 | 43 | 136 |
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| Proceeds from financing receivables | - | - | 279 | 56 | 28 | 38 | - | - | 46 | - | 7 | 17 | 1 | 51 |
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| Proceeds from sales of real estate and other, net of cash disposed | - | - | - | 1,467 | 88 | 289 | 663 | 1,382 | 940 | 85 | 758 | 625 | -10 | 1,421 |
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| Other investing activities | 18 | -9 | 38 | 22 | 29 | 7 | 28 | -12 | -4 | 6 | 5 | -20 | -3 | 13 |
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| Net cash provided by (used in) investing activities | - | - | -147 | - | - | - | 266 | 374 | 585 | -736 | -1,772 | 416 | -365 | 81 |
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| Proceeds from Short-term and Long-term Debt | - | - | - | - | - | - | 670 | 416 | 400 | 2,035 | 1,949 | - | 596 | 1,424 |
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| Repayments and repurchases of debt | - | - | - | - | - | - | 782 | 231 | 409 | 406 | 1,218 | 711 | 660 | 750 |
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| Repurchases of common stock | 396 | 136 | 275 | 443 | 715 | 272 | 743 | 946 | 421 | 69 | - | 369 | 453 | 1,190 |
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| Dividends paid | - | - | - | - | - | - | - | 68 | 80 | 20 | - | - | 47 | 60 |
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| Payment of withholding taxes for stock-based compensation | - | - | - | - | - | - | - | - | - | - | - | - | - | 43 |
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| Other financing activities | -13 | 2 | -6 | -14 | -7 | -6 | -12 | -11 | -7 | -15 | -18 | -18 | -14 | 1 |
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| Net cash used in financing activities | - | - | -264 | - | - | - | -858 | -850 | -541 | 1,525 | 1,288 | -1,106 | -578 | -618 |
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| Effect of exchange rate changes on cash | - | - | - | - | - | - | - | - | 1 | -4 | -3 | 18 | -2 | -3 |
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| Net increase (decrease) in cash, cash equivalents, and restricted cash, including cash, cash equivalents, and restricted cash classified within current assets held for sale | - | - | - | - | - | - | - | - | - | - | - | - | -145 | 93 |
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| Net increase (decrease) in cash, cash equivalents, and restricted cash classified within assets held for sale | - | - | - | - | - | - | - | - | - | - | - | - | -3 | 3 |
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| Net increase (decrease) in cash, cash equivalents, and restricted cash | - | - | - | - | - | - | - | -130 | 441 | 174 | -172 | 2 | -148 | 96 |
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| Cash paid during the period for interest | - | - | - | - | - | - | - | - | - | 105 | 145 | 138 | 115 | 167 |
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| Income Taxes Paid, Net | - | - | - | - | - | - | - | - | - | - | -210 | 101 | 153 | 160 |
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| Operating Lease, Payments | - | - | - | - | - | - | - | - | - | 42 | 41 | 47 | 54 | 45 |
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| Change in accrued capital expenditures | - | - | -7 | 4 | 6 | 2 | 9 | - | - | -12 | 2 | 1 | 9 | -4 |
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| Non-Cash contributions to investments | - | - | - | - | 17 | 13 | 5 | - | - | 35 | 61 | - | 4 | 223 |
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| Noncash Issuance Of Financing Receivables | - | - | - | - | - | - | - | - | - | - | 11 | - | - | 185 |
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| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | - | - | - | - | - | - | - | - | - | 14 | 16 | 25 | 16 | 19 |
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| Non-cash legal defeasance of Series 2005 Bonds (Note 7) | - | - | - | - | - | - | - | - | - | - | - | 166 | - | - |
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| Non-cash reduction in right-of-use assets and operating lease liabilities for lease reassessment | - | - | - | - | - | - | - | - | - | - | - | 13 | - | - |
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| Non-cash held-to-maturity debt security received (Note 7) | - | - | - | - | - | - | - | - | - | - | - | 19 | - | - |
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| Non-cash repurchases of common stock (Note 16) | - | - | - | - | - | - | - | - | - | - | - | 9 | - | - |
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| Non-cash contingent consideration liability assumed in acquisition (Note 7) | - | - | - | - | - | - | - | - | - | - | - | - | 107 | 141 |
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| Non-cash contingent consideration receivable recorded in disposition (Note 4, Note 7) | - | - | - | - | - | - | - | - | - | - | - | - | 28 | 5 |
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| Non-cash deferred consideration liability assumed in acquisition (Note 7) | - | - | - | - | - | - | - | - | - | - | - | - | - | 58 |
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| Non-cash redemption of HTM debt security in exchange for equity method investment (Note 4) | - | - | - | - | - | - | - | - | - | - | - | - | 32 | - |
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| Noncash Redemption Of Financing Receivable | - | - | - | - | - | - | - | - | - | - | - | - | 20 | - |
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