Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016		Dec. 28, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized (loss) gain on available-for-sale investment, net of tax	$ (1.1)	$ 28.6	[1]	$ 11.5
Temp Holdings Investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized (loss) gain on available-for-sale investment, net of tax	(1.1)	28.6
Cost of available-for-sale investment	$ 17.7	$ 17.2

[1] Fiscal year included 53 weeks.