Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-lived intangible assets:
Finite-lived intangible assets, gross carrying amount	$ 103	$ 104
Finite-lived intangible assets, accumulated amortization	32	30
Indefinite-lived intangible assets, gross carrying amount	76	77
Total other intangible assets, gross carrying amount	179	181
Total other intangible assets, accumulated amortization	32	30
Amortization Expense [Abstract]
Amortization expense	4	3	$ 3
Estimated amortization expense in 2025	4
Estimated amortization expense in 2026	4
Estimated amortization expense in 2027	4
Estimated amortization expense in 2028	4
Estimated amortization expense in 2029	4
Customer relationships
Finite-lived intangible assets:
Finite-lived intangible assets, gross carrying amount	93	93
Finite-lived intangible assets, accumulated amortization	24	21
Other
Finite-lived intangible assets:
Finite-lived intangible assets, gross carrying amount	10	11
Finite-lived intangible assets, accumulated amortization	$ 8	$ 9