Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jul. 04, 2015	Jul. 05, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate	26.30%	31.00%
Benefit related to state tax credits	$ 9.3
Current deferred tax assets	266.3		$ 253.4
Current deferred tax Liabilities	10.2		13.1
Non-current deferred tax liabilities	$ 758.3		$ 779.3