Income Taxes - Reconciliation of the Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income tax expense at the federal statutory rate	$ 40	$ 36	$ 38
Foreign rate differential	(16)	(17)	(25)
State income taxes, net of effect of federal tax benefit	9	9	5
Unrecognized tax benefits and related interest	11	15	12
Change in cost-sharing treatment of stock-based compensation	15	(3)	(5)
FDII, GILTI and other provisions	(3)	(5)
Impacts related to the 2017 Tax Act			73
Research tax credit	(11)	(9)	(8)
Stock-based compensation	4	8	13
Change in valuation allowance	6	9	25
Local income tax on intercompany transaction	7	10
Executive compensation	3	2	1
Other, net	3	5
Provision for income taxes	$ 68	$ 60	$ 129	[1]

[1] The year ended December 31, 2017 reflects $67 million of Transition Tax and $6 million of tax expense recorded due to the remeasurement of net deferred tax assets related to the 2017 Tax Act enacted on December 22, 2017. Refer to “Note 11: Income Taxes” for further information.