Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment	$ 0	$ 0	$ 46,600,000
Amortization of intangible assets	112,000,000	110,000,000	$ 109,000,000
Tradenames
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets other than goodwill	$ 150,000,000	$ 153,000,000