Fair Value Measurements (Additional Fair Value Information Relating To The Company's Financial Instruments Outstanding) (Details) - USD ($) $ in Millions	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 216.1	$ 116.0	$ 148.0	$ 147.2
Cash and Cash Equivalents, Fair Value Disclosure	22.2
Long-term debt	489.6	611.4
Credit Facility	619.9	729.7
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	400.0	400.0
Notes Payable, Fair Value Disclosure	410.6	399.9
Revolving Credit Facility [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	94.0	216.0
Long-term debt		216.0
Credit Facility	94.0
Promissory Notes And Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility	0.8	1.2
Promissory Notes And Other [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility	0.8	1.2
Debt Instrument, Fair Value Disclosure	0.8	1.2
Uncommitted Facilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility	130.0	118.0
Uncommitted Facilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term Debt	130.0	118.0
Short-term Debt, Fair Value	$ 130.0	$ 118.0