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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Contract assets | $ 329 | $ 238 |
Impairment Long Lived Asset Held For Use Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag | impairment losses |  |
Impairment of held for use assets | $ 89 |  | $ 42
Operating lease impairment loss | $ 58 | $ 0 | $ 30
Recognized compensation cost award service period | 3 years |  |
Purchase of common shares (in shares) (current year less than) | 5 | 2 | 1
Common Stock |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Purchase of common shares (in shares) (current year less than) | 3 |  |
Buildings |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Fixed asset, estimated useful life | 30 years |  |
Customer relationships |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 10 years |  |
Minimum |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Payment or collection period | 1 day |  |
Lease renewal term | 1 year |  |
Minimum | Furniture and fixture |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Fixed asset, estimated useful life | 3 years |  |
Minimum | Software |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 1 year |  |
Minimum | Internally developed software |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 3 years |  |
Maximum |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Payment or collection period | 3 days |  |
Lease renewal term | 5 years |  |
Maximum | Furniture and fixture |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Fixed asset, estimated useful life | 7 years |  |
Maximum | Trademarks |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 5 years |  |
Maximum | Software |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 10 years |  |
Maximum | Internally developed software |  |  |
Summary of Significant Accounting Policies (Textuals) [Abstract] |  |  |
Intangible assets, estimated useful lives | 10 years |  |

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