Intangible Assets, net and Goodwill - Intangible Asset Amortization Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 306	$ 297	$ 260
Amortization expense, 2018	250
Amortization expense, 2019	219
Amortization expense, 2020	211
Amortization expense, 2021	184
Amortization expense, 2022	$ 167