Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Line Items]
Effective income tax rate	5.50%	31.30%	22.70%	29.40%
Excess income tax benefit from share-based payment awards	$ 1,800,000		$ 12,400,000
Income tax benefit per diluted share	$ 0.01		$ 0.06
Unrecognized tax benefits from expiration of stature of limitations	$ 41,800,000
Discrete income tax expense (benefit)			$ 7,900,000
Increase (decrease) in valuation allowances			19,400,000
Deferred tax liability, unremitted foreign earnings	3,100,000		3,100,000
Favorable return to provision adjustment from foreign tax credit			14,600,000
Decrease in unrecognized tax benefits	$ 35,200,000		$ 35,200,000
Unrecognized Tax Benefits [Member]
Income Tax Disclosure [Line Items]
Discrete income tax expense (benefit)				$ 16,900,000
Return To Provision Adjustments [Member]
Income Tax Disclosure [Line Items]
Discrete income tax expense (benefit)				(15,300,000)
Venezuela [Member]
Income Tax Disclosure [Line Items]
Foreign currency exchange losses related to Venezuelan subsidiaries				(30,700,000)
Tax benefits related to Venezuelan subsidiaries				$ 0