Income Taxes - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Apr. 30, 2020	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Income Taxes [Line Items]
Gross unrecognized tax benefits		$ 46,300,000	$ 47,400,000	$ 51,400,000	$ 13,800,000
Amount of tax benefits that, if recognized, would impact the effective tax rate		45,900,000
Payment of penalties		200,000	400,000
Payment of interest expense		4,600,000	$ 3,700,000
Foreign credit carryforwards		29,600,000
Tax loss carryforwards		2,923,500,000
Deferred tax assets, valuation allowance		716,700,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign		2,824,900,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign (jurisdictions with unlimited tax loss carryforward periods)		1,785,000,000.0
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration		98,600,000
State tax losses available for carry forward		61,100,000
Income tax increase		$ 14,100,000
Base erosion and anti-abuse tax	0.003	0.017	0	0
Income tax expense, CARES Act		$ 26,900,000
Effective tax rate reconciliation, CARES Act		1.00%
Effective tax rate reconciliation, CARES Act, amount		$ 5,100,000
Minimum
Income Taxes [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible		0
Maximum
Income Taxes [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible		$ 10,600,000