Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 9,360	$ 9,360
Finite-lived intangible assets, net	138	199
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	0	0
Accumulated amortization	0	5,699
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, net	138	199
Accumulated amortization	$ 1,924	1,876
Fully Amortized And Retired Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Customer relationships fully amortized and retired		$ 5,700