Long-Term Debt and Capital Leases (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Feb. 25, 2011	Apr. 01, 2012	Jan. 01, 2012
Long-Term Debt and Capital Leases (Textual) [Abstract]
Credit agreement provides for facility fees Minimum	0.20%
Credit agreement provides for facility fees Maximum	0.45%
Total capital leases		$ 14.8
Capital leases, current		1.4	1.4
New facility termination date		2016-02-25
Available borrowings capacity under letters of credit		399.5
Available capacity under credit facility		550.0
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letter of credit, outstanding		13.9
Uncommitted credit line permits extensions for standby letters of credit		5.0
Incremental line of credit for standby letters of credit		$ 2.0