Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 6,627	$ 6,666
Other intangible assets, net	5,387	5,725
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	4,977	5,325
Accumulated amortization	3,096	2,779
Capitalized software
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	401	378
Accumulated amortization	368	349
Trade names
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	9	22
Accumulated amortization	$ 122	$ 109