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Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill, Customer Relationships, and Other Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Goodwill [Line Items] |  |
Goodwill | $ 15,947 | $ 15,986
Indefinite-life intangible assets | 9 | 9
Total other intangible assets, net | 6,628 | 6,970
Customer relationships |  |
Goodwill [Line Items] |  |
Finite-lived intangible assets, net | 5,002 | 5,365
Accumulated amortization | 3,422 | 11,740
Capitalized software |  |
Goodwill [Line Items] |  |
Finite-lived intangible assets, net | 1,500 | 1,459
Accumulated amortization | 3,741 | 3,624
Trade names, patents and other |  |
Goodwill [Line Items] |  |
Finite-lived intangible assets, net | 117 | 137
Accumulated amortization | 172 | $ 160
Fully amortized and retired customer relationships |  |
Goodwill [Line Items] |  |
Gross carrying value | $ 8,700 |

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