Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Transition tax expense			$ 2.4
Impact on effective tax rate			0.30%
Effective income tax rate	23.40%	28.20%
U.S. corporate federal income tax rate	21.00%	35.00%
Benefit related to return to provision changes in estimate and state tax credits		$ 13.2
Non-current deferred tax liabilities included in deferred credits and other liabilities	$ 382.7		$ 382.7	$ 329.3
Non-current deferred tax assets included in other assets	$ 0.8		$ 0.8	$ 0.6