Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Net Amount	$ 666	$ 670
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	3 years	4 years
Gross Carrying Amount	$ 171	$ 176
Accumulated Amortization	63	58
Net Amount	$ 108	$ 118
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	6 years	6 years
Gross Carrying Amount	$ 2,523	$ 2,468
Accumulated Amortization	1,967	1,919
Net Amount	$ 556	$ 549
Trade names and associated trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	2 years	2 years
Gross Carrying Amount	$ 8	$ 9
Accumulated Amortization	6	6
Net Amount	$ 2	$ 3