Debt And Bank Credit Facilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Current Fiscal Year End Date	--12-29
Senior Notes	$ 750.0	$ 750.0
private placement notes		500.0
Principal amount of debt	165.0
Repayment of term loan	90.0	20.0
Revolving credit facility	500.0
Revolving credit facility, amount outstanding	0	9.0
Interest rate based on margin over LIBOR	25000000000.00%
Average balance outstanding under the Facility	30.6	10.7
Available borrowing capacity under the Facility	472.0
Other notes payable amount outstanding	$ 13.5	$ 15.2
Weighted average interest rate of other notes payable	2.40%	2.20%
Term Loan [Member]
Debt Instrument [Line Items]
Interest rate based on margin over London Inter-Bank Offered Rate	1.30%