Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended
	Mar. 30, 2012	Sep. 28, 2012 Pension Benefits [Member]	Sep. 30, 2011 Pension Benefits [Member]	Sep. 28, 2012 Pension Benefits [Member]	Sep. 30, 2011 Pension Benefits [Member]	Sep. 28, 2012 Other Post-retirement Benefits [Member]	Sep. 30, 2011 Other Post-retirement Benefits [Member]	Sep. 28, 2012 Other Post-retirement Benefits [Member]	Sep. 30, 2011 Other Post-retirement Benefits [Member]
Components of expense/ (income) related to net benefit expense:
Service Cost		$ 11	$ 10	$ 33	$ 30	$ 1	$ 1	$ 3	$ 3
Interest Cost		31	30	92	90	4	4	12	10
Expected Return on Plan Assets		(43)	(39)	(124)	(118)
Amortization of Net Loss		21	18	62	54	2	2	7	5
Amortization of Prior Service Costs						0	0	(1)	(1)
Net Periodic Benefit Cost		20	19	63	56	7	7	21	17
Employer contribution to qualified pension plans	275
Employer contribution to qualified pension plans, required minimum amount	$ 25