Income Taxes - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017 USD ($) Provision	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Income Taxes [Line Items]
Reduction in corporate tax rate		35.00%	35.00%	35.00%
Tax code changes description		The TCJA-17 makes broad and complex changes to the U.S. tax code, including, but not limited to, (1) reducing the U.S. federal corporate tax rate from 35 percent to 21 percent; (2) requiring companies to pay a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries; (3) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; (4) requiring a current inclusion in U.S. federal taxable income of certain earnings of controlled foreign corporations through the implementation of a territorial tax system; and (5) creating a new limitation on deductible interest expense.
Tax Cuts and Jobs Act of 2017, Accounting Complete [true false]		false
Provisional decrease in deferred tax assets		$ 97,000,000
Provisional decrease in deferred tax liabilities		127,000,000
Adjustment to deferred tax benefit		30,000,000
Estimated transition tax obligations		$ 11,300,000
Number of anti-base erosion tax provisions | Provision		2
Provisional deferred tax - GILTI		$ 0
Income tax expense - BEAT		0
Foreign pre-tax earnings		70,000,000	$ 58,000,000	$ 41,000,000
Unremitted foreign earnings			0	0
Accrued tax provision		11,300,000
Income tax benefits		$ (363,697,000)	$ (409,187,000)	$ (395,203,000)
Effective tax rates		32.00%	35.40%	34.50%
Effective tax rates including income attributable to noncontrolling interests		32.60%	36.80%	36.70%
Deferred federal and state tax benefit		$ 5,000,000	$ 10,000,000
Provisional decrease in deferred tax assets due to TCJA-17		97,000,000
Provisional decrease in deferred tax assets liabilities net due to TCJA-17		30,000,000
Future taxable income, amount		1,090,000,000
Deferred state tax benefit (net of the federal benefit)		192,000	(820,000)	$ (302,000)
Deferred foreign tax benefit		6,000,000
Valuation allowances		70,227,000	56,333,000
Reduction of the federal benefit due to the change in U.S. corporate income tax rates		12,000,000
Increase in estimated liabilities for uncertain tax positions		1,000,000	1,000,000
Impact of unrecognized tax benefits if recognized		$ 1,000,000	1,000,000
Period of expiration of the statute of limitations for certain jurisdictions		Within the next twelve months
Jurisdictions statutes of limitations expiration period		12 months
Maximum
Income Taxes [Line Items]
Accrued interest and penalties		$ 1,000,000	1,000,000
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years		4 years
Minimum
Income Taxes [Line Items]
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years		3 years
Allowance in relation to state tax benefit
Income Taxes [Line Items]
Valuation allowances		$ 66,000,000	52,000,000
Net Operating Losses
Income Taxes [Line Items]
Increase in valuation allowance		2,000,000
Foreign Net Operating Losses and Credit Carryforwards
Income Taxes [Line Items]
Increase in valuation allowance		4,000,000	4,000,000
State and Local Jurisdiction
Income Taxes [Line Items]
Deferred state tax benefit (net of the federal benefit)		70,000,000
Foreign Tax Authority
Income Taxes [Line Items]
Net operating losses and credit		26,000,000
ASU 2016-09
Income Taxes [Line Items]
Income tax benefits		$ 22,000,000
Excess tax benefit from share based compensation			$ 45,200,000	$ 47,400,000
Scenario, Forecast
Income Taxes [Line Items]
Reduction in corporate tax rate	21.00%