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Intangible Assets - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 21,595 | $ 21,685
Accumulated Amortization | 9,601 | 9,270
Net Book Value | 11,994 | 12,415
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 14,644 | 14,795
Accumulated Amortization | 6,671 | 6,371
Net Book Value | 7,973 | 8,424
Acquired software and technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,360 | 2,510
Accumulated Amortization | 1,162 | 1,234
Net Book Value | 1,198 | 1,276
Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 635 | 633
Accumulated Amortization | 310 | 295
Net Book Value | 325 | 338
Purchased software |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,109 | 1,146
Accumulated Amortization | 605 | 595
Net Book Value | 504 | 551
Capitalized software and other intangibles |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 2,847 | 2,601
Accumulated Amortization | 853 | 775
Net Book Value | $ 1,994 | $ 1,826

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