Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Uncertain tax positions	$ 5,700,000	$ 0	$ 0
Amount of tax benefit recognized	50.00%
Provision for federal income tax rate	$ 0
Undistributed earnings of the Company's foreign subsidiaries	854,000,000
Income taxes paid	$ 23,000,000	$ 61,700,000	69,900,000
United Kingdom [member] | Patent Box [Member]
Income Taxes [Line Items]
Benefit recorded on intangible assets			$ 2,000,000	$ 2,000,000