| Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 515 | 1,188 | 605 | 479 | 499 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 639 | 767 | 1,313 | 1,395 | 1,444 |
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| Inventories | 64 | 69 | 163 | 150 | 143 |
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| Contract assets | 142 | 217 | 459 | 436 | 453 |
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| Prepaid expenses and other current assets | 77 | 83 | 110 | 122 | 119 |
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| Total current assets | 1,437 | 2,626 | 2,652 | 2,582 | 2,658 |
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| Property and equipment, net | - | - | - | 385 | 379 |
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| Operating lease right-of-use assets | 107 | 101 | 222 | 233 | 268 |
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| Goodwill | 1,082 | 1,106 | 2,382 | 2,471 | 2,894 |
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| Intangible assets, net | 965 | 882 | 1,784 | 1,620 | 1,660 |
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| Deferred tax assets | 89 | 73 | 108 | 113 | 57 |
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| Pension and post-retirement assets | - | - | 392 | 111 | 120 |
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| Other assets | 30 | 45 | 144 | 75 | 116 |
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| Total assets | 4,065 | 5,159 | 8,091 | 7,590 | 8,152 |
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| Debt, Current | 18 | 1 | 206 | 5 | 4 |
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| Accounts payable | 150 | 236 | 490 | 472 | 497 |
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| Contingent consideration and compensation liabilities | - | - | - | - | 20 |
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| Accrued Salaries, Current | 182 | 209 | 337 | 363 | 381 |
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| Contract liabilities | 219 | 243 | 463 | 526 | 590 |
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| Operating and finance leases | 31 | 27 | 73 | 75 | 90 |
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| Other accrued liabilities | 133 | 129 | 325 | 344 | 303 |
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| Total current liabilities | 841 | 867 | 1,921 | 1,807 | 1,885 |
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| Long-term debt, less current portion | 1,397 | 1,766 | 2,583 | 2,322 | 2,749 |
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| Pension and post-retirement obligations | - | - | 40 | 50 | 48 |
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| Contingent consideration and compensation liabilities | 22 | 10 | 6 | 11 | 22 |
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| Operating and finance leases | 96 | 79 | 166 | 172 | 192 |
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| Deferred tax liabilities | 45 | 43 | 340 | 233 | 198 |
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| Other noncurrent liabilities | 106 | 71 | 111 | 127 | 105 |
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| Total liabilities | 2,507 | 2,836 | 5,167 | 4,722 | 5,199 |
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| Temporary Equity, Carrying Amount, Attributable to Parent | - | - | 797 | 797 | - |
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| Additional paid-in capital | 1,856 | 2,560 | 2,558 | 2,572 | 3,305 |
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| Retained earnings (accumulated deficit) | -284 | -237 | -164 | -11 | 215 |
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| Accumulated other comprehensive loss | -14 | - | -267 | -490 | -567 |
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| Total shareholders’ equity | 1,558 | 2,323 | 2,127 | 2,071 | 2,953 |
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| Total liabilities, redeemable convertible preferred stock, and shareholders’ equity | 4,065 | 5,159 | 8,091 | 7,590 | 8,152 |
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