Income Taxes - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2019	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Discrete income tax expense	$ 4
Tax from equity compensation			$ 3
Income tax expense from GILTI			3
Income tax expense (benefit)			7	$ (3)	$ 125
Loss before income taxes			$ 13	$ (27)	$ (58)
Effective income tax rate			53.80%	11.10%	(215.50%)
Tax Cuts and Jobs Act, change in tax rate, income tax expense (benefit)		$ 126		$ (6)
Tax expense, issuance of new US Treasury regulations			$ 3	1
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, provisional liability		145	1		$ 145
Cumulative foreign earnings		1,300
Tax Cuts and Jobs Act of 2017, deferred tax asset, existing income tax expense (benefit)		19
Net operating loss and tax credit carryforwards			80
Valuation allowance			41
Tax credit carryforward, FIN 48 reserve			15
Tax liability related to uncertain tax positions		$ 28	37	34	$ 28
Uncertain tax positions			19	$ 17
Uncertain tax positions related to business acquisitions not recognized on balance sheet			18
Uncertain tax positions recognized as current liability on balance sheet			37
Interest accruals related to uncertain tax liabilities			2
United States And Certain Foreign Jurisdictions
Income Taxes
Net operating loss carryforwards in the United States and certain foreign jurisdictions			11
Domestic Tax Authority
Income Taxes
Net operating loss carryforwards in the United States and certain foreign jurisdictions			3
Research Tax Credit Carryforward | Domestic Tax Authority
Income Taxes
Research and development tax credit carryforwards			10
Research Tax Credit Carryforward | State and Local Jurisdiction
Income Taxes
Research and development tax credit carryforwards			$ 56