Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Income Tax Disclosure [Abstract]
Inventories	$ 29.4	$ 29.2	$ 24.4
Accruals not currently deductible	71.1	72.7	63.2
Tax credit carryforward	10.2
Valuation allowance	(1.1)	(1.1)	(2.4)
Total current (included in deferred income tax assets and other accrued liabilities)	109.6	100.8	85.2
Employee benefits	101.2	91.5	62.5
Net operating losses	44.4	53.5	59.9
Depreciation and amortization	(199.3)	(191.2)	(180.8)
Valuation allowance	(30.9)	(33.7)	(43.0)
Equity-based compensation	22.7	19.6	17.6
Other	(1.6)	(5.7)	(2.9)
Total long term	(63.5)	(66.0)
Net deferred income tax asset (liability)	46.1	34.8
Inventories	29.4	29.2	24.4
Accruals not currently deductible	71.1	72.7	63.2
Tax credit carryforward	10.2
Valuation allowance	(1.1)	(1.1)	(2.4)
Total current (included in deferred income tax assets and other accrued liabilities)	109.6	100.8	85.2
Employee benefits	101.2	91.5	62.5
Net operating losses	44.4	53.5	59.9
Depreciation and amortization	(199.3)	(191.2)	(180.8)
Valuation allowance	(30.9)	(33.7)	(43.0)
Equity-based compensation	22.7	19.6	17.6
Other	(1.6)	(5.7)	(2.9)
Total long term	$ (169.8)	$ (159.2)	(86.7)
Net deferred income tax asset (liability)			$ (1.5)