Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives, gross	$ 125	$ 124
Intangible assets with indefinite lives, accumulated amortization	(6)	(6)
Intangible assets with indefinite lives, net	119	118
Intangible assets, gross	173	173
Intangible assets, accumulated amortization	(38)	(36)
Intangible assets, net	135	137
Trademarks and Patents
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	23	24
Finite-lived intangible assets, accumulated amortization	(19)	(19)
Finite-lived intangible assets, net	4	5
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	25	25
Finite-lived intangible assets, accumulated amortization	(13)	(11)
Finite-lived intangible assets, net	$ 12	$ 14