Income Taxes - Deferred Taxes (Details) - USD ($) $ in Millions	Jan. 03, 2016	Dec. 28, 2014
Components of Deferred Tax Assets and Liabilities
Depreciation and amortization	$ (14.3)	$ (14.4)
Employee compensation and benefit plans	70.6	70.4
Workers’ compensation	21.4	21.6
Unrealized gain on securities	(36.7)	(23.7)
Loss carryforwards	40.6	47.2
Credit carryforwards	113.4	103.0
Other, net	8.1	11.0
Valuation allowance	(50.9)	(58.5)
Net deferred tax assets	$ 152.2	$ 156.6