Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Other Financial Data [Abstract]
Deferred revenue	$ 355		$ 355		$ 296
Taxes payable	100		100		80
Leases	228		228		234
Other	735		735		561
Total	1,418		1,418		$ 1,171
Revenue recognized from deferred revenue	$ 173	$ 171	$ 344	$ 288