Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate	21.90%	32.70%
U.S. corporate federal income tax rate	21.00%	35.00%
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 376.6		$ 329.3
Non-current deferred tax assets included in other assets	$ 0.7		$ 0.6