The Company and Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 15, 2013	Jun. 16, 2012	Jun. 15, 2013	Jun. 16, 2012
Segment Reporting Information [Line Items]
Sales and other revenue	$ 8,696.1	$ 8,833.9	$ 17,202.8	$ 17,337.8
LIFO expense			0	0.6
Cash surrender value of life insurance policies	58.1		58.1
Loans against company-owned life insurance policies	40.5		40.5
Company-owned life insurance policies, Net	17.6		17.6
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Sales and other revenue			$ 1.0	$ 1.1