Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Other Financial Data [Abstract]
Deferred revenue	$ 251		$ 251		$ 270
Taxes payable	134		134		93
Leases	224		224		210
Other	632		632		513
Total	1,241		1,241		$ 1,086
Revenue recognized from deferred revenue	$ 69	$ 144	$ 357	$ 385