Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 23, 2012	Sep. 25, 2011	Sep. 23, 2012	Dec. 25, 2011
Income Taxes (Textual) [Abstract]
Unrecognized tax benefits that, if recognized, would impact effective tax rate	$ 72.7		$ 72.7	$ 77.7
Total amount of unrecognized tax benefits, excluding the federal tax benefit of state tax deductions	98.5		98.5	110.3
Unrecognized Tax Benefits, Period Increase (Decrease)			(11.8)
Unrecognized tax benefits, increase for current year tax positions			7.5
Unrecognized tax benefits, increase for prior year tax positions			11.1
Unrecognized tax benefits, reductions for prior year tax positions			20.4
Tax settlements			7.1
lapse of statutes of limitations			2.9
Recognized income (expense) from interest and the release of penalty reserves	2.8	6.2
Accrued interest and penalties payable related to unrecognized tax benefits	27.2		27.2	34.8
Estimated decrease in gross unrecognized tax positions within the next 12 months, maximum	$ 49.3		$ 49.3