Employee Benefit Plans (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 24, 2010	Sep. 30, 2011	Sep. 24, 2010
Components of expense/ (income) related to net benefit expense:
Anticipated contributions to qualified pension plan in curent fiscal year	$ 0		$ 0
Pension Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	10	10	30	31
Interest Cost	30	30	90	91
Expected Return on Plan Assets	(39)	(42)	(118)	(124)
Amortization of Net Loss	18	15	54	44
Net Periodic Benefit Cost	19	13	56	42
Other Post-Retirement Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	1	2	3	4
Interest Cost	4	5	10	14
Amortization of Net Loss	2	1	5	5
Amortization of Prior Service Cost	0	0	(1)	0
Net Periodic Benefit Cost	$ 7	$ 8	$ 17	$ 23