Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 9,360	$ 9,360
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, less accumulated amortization	129	138
Accumulated amortization	$ 1,938	$ 1,924