Goodwill and Other Intangible Assets - Definite-lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Definite-lived Intangible assets
Gross Carrying Amount	$ 951	$ 782
Accumulated Amortization	(653)	(590)
Net Carrying Amount	298	192
Aggregate amortization expense for definite-lived intangible assets	52	45	$ 34
Impairments of finite-lived intangible assets	1	0	$ 0
Estimated future intangible amortization expense
2024	53
2025	47
2026	43
2027	35
2028	24
Customer relationships
Definite-lived Intangible assets
Gross Carrying Amount	380	265
Accumulated Amortization	(191)	(174)
Net Carrying Amount	189	91
Contracts
Definite-lived Intangible assets
Gross Carrying Amount	228	222
Accumulated Amortization	(219)	(210)
Net Carrying Amount	9	12
Other
Definite-lived Intangible assets
Gross Carrying Amount	343	295
Accumulated Amortization	(243)	(206)
Net Carrying Amount	$ 100	$ 89