Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Jan. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 12,657	$ 15,986	$ 0	$ 18,870
Indefinite-lived intangible assets	9	9
Total other intangible assets, net	6,166	6,970
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	4,574	5,365
Accumulated amortization	3,606	11,740
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	1,482	1,459
Accumulated amortization	3,895	3,624
Trade names, patents and other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	101	137
Accumulated amortization	$ 188	160
Fully Amortized And Retired Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets		$ 8,700