Other Financial Data - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Other Financial Data [Abstract]
Deferred revenue	$ 251		$ 311
Taxes payable	83		139
Other	602		420
Total	936	$ 883	870
Deferred revenue recognized	$ 487
Current portion of transition tax liability			$ 42