(Net Benefit Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011		Dec. 31, 2010		Dec. 25, 2009
Pension Benefits
Components of expense/ (income) related to net benefit expense [Abstract]
Service Cost	$ 40		$ 41		$ 32
Interest Cost	121		122		129
Expected Return on Plan Assets	(157)		(165)		(154)
Amortization of Net Loss	71		58		26
Amortization of Prior Service Cost	0		0		2
Net Periodic Benefit Expense	75		56		35
Settlement gain	(2)	[1]	(2)	[1]	0	[1]
Total Expense	73		54		35
Other Post-Retirement Benefits
Components of expense/ (income) related to net benefit expense [Abstract]
Service Cost	2		5		5
Interest Cost	11		20		25
Expected Return on Plan Assets	0		0		0
Amortization of Net Loss	7		7		4
Amortization of Prior Service Cost	(1)		0		0
Net Periodic Benefit Expense	19		32		34
Settlement gain	0	[1]	0	[1]	0	[1]
Total Expense	$ 19		$ 32		$ 34

[1] In 2011 and 2010, in one of the company's pension plans, the lump-sum payments exceeded the sum of the service cost and interest cost recognized. As such, the company was required to recognize a portion of its accumulated other comprehensive income related to that plan into earnings.