Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived and Indefinite-Lived Intangible Assets
Goodwill	$ 6,666	$ 7,405	$ 7,415
Finite lived intangible assets, net	5,725	6,605
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets
Finite lived intangible assets, net	5,325	6,156
Accumulated amortization	2,779	2,246
Capitalized software
Finite-Lived and Indefinite-Lived Intangible Assets
Finite lived intangible assets, net	378	401
Accumulated amortization	349	256
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets
Finite lived intangible assets, net	22	48
Accumulated amortization	$ 109	$ 83