Goodwill and Other Intangible Assets, Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Intangible Assets [Abstract]
Finite-lived intangible assets, gross carrying amount	$ 718	$ 682
Finite-lived intangible assets, accumulated amortization	172	110
Indefinite-lived intangible assets, gross carrying amount	64	75
Total other intangible assets, gross carrying amount	782	757
Total other intangible assets, accumulated amortization	172	110
Amortization Expense [Abstract]
Amortization expense	61	45	$ 32
Estimated amortization expense in 2021	41
Estimated amortization expense in 2022	41
Estimated amortization expense in 2023	40
Estimated amortization expense in 2024	38
Estimated amortization expense in 2025	36
Customer Relationships [Member]
Other Intangible Assets [Abstract]
Finite-lived intangible assets, gross carrying amount	647	611
Finite-lived intangible assets, accumulated amortization	111	76
Other [Member]
Other Intangible Assets [Abstract]
Finite-lived intangible assets, gross carrying amount	71	71
Finite-lived intangible assets, accumulated amortization	$ 61	$ 34