Employee Benefit Plans (Net Benefit Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Pension Plans, Defined Benefit [Member]
Components of expense/ (income) related to net benefit expense [Abstract]
Service Cost	$ 44		$ 40		$ 41
Interest Cost	123		121		122
Expected Return on Plan Assets	(166)		(157)		(165)
Amortization of Net Loss	82		71		58
Amortization of Prior Service Cost	0	[1]	0	[1]	0
Net Periodic Benefit Expense	83		75		56
Settlement gain	(2)	[2]	(2)	[2]	(2)	[2]
Total Expense	81		73		54
Other Post-Retirement Benefits
Components of expense/ (income) related to net benefit expense [Abstract]
Service Cost	4		2		5
Interest Cost	16		11		20
Expected Return on Plan Assets	0		0		0
Amortization of Net Loss	9		7		7
Amortization of Prior Service Cost	(1)	[1]	(1)	[1]	0
Net Periodic Benefit Expense	28		19		32
Settlement gain	0	[2]	0	[2]	0	[2]
Total Expense	$ 28		$ 19		$ 32

[1] Amortization of prior service costs estimated to be expensed in 2013 are less than $1 million for pension benefits. The estimated post-retirement benefits amount to be credited to expense for 2013 is $1 million.

[2] Settlement gains were recognized as one of the pension plan's lump-sum payments exceeded the sum of the service cost and interest cost recognized. The gain is the recognition of a portion of its accumulated other comprehensive income related to that plan.