Goodwill, Customer Relationships and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 6,955	$ 6,955
Other intangible assets, less accumulated amortization	92
Goodwill, Impaired, Accumulated Impairment Loss	(2,405)	(2,405)
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, less accumulated amortization	92	103
Accumulated amortization	$ (1,964)	$ (1,966)