Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 24, 2012	Mar. 26, 2011
Supplemental Cash Flow Information [Abstract]
Capital expenditures payable at year-end included into accounts payable	$ 2.0
Capital expenditures payable at quarter-end included into accounts payable	4.3	9.4
Receivables	1
Other assets	28
Notes receivables net	29
Accrued liabilities	1
Other long term liabilities	22.8
Deferred Income	$ 23.8