Fair Value Measurements (Additional Fair Value Information Relating To The Company's Financial Instruments Outstanding) (Details) - USD ($) $ in Millions	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 116.0	$ 148.0	$ 147.2	$ 157.8
Long-term debt	611.4	671.0
Credit Facility	729.7	735.4
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	116.0	148.0
Cash and Cash Equivalents, Fair Value Disclosure	116.0	148.0
Principal amount	400.0	400.0
Notes Payable, Fair Value Disclosure	399.9	396.9
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	216.0	277.0
Long-term debt		277.0
Credit Facility	216.0
Promissory Notes And Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility	1.2	7.5
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	1.2	7.6
Debt Instrument, Fair Value Disclosure	1.2	7.6
Uncommitted Facilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit Facility	118.0	57.0
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	118.0	57.0
Short-term Debt, Fair Value	$ 118.0	$ 57.0