Interest and Other Expense (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Interest income	$ (20)	$ (17)	$ (61)	$ (50)
Interest expense from debt and amortization of debt discount and deferred financing costs	23	33	68	118
Unrealized gain on equity investment	0	0	(38)	0
Other expense (income), net	(5)	(3)	(2)	(1)
Interest and other expense (income), net	$ (2)	$ 13	$ (33)	$ 67