Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended		3 Months Ended		6 Months Ended
	Mar. 30, 2012	Jun. 29, 2012 Pension Benefits	Jul. 01, 2011 Pension Benefits	Jun. 29, 2012 Pension Benefits	Jul. 01, 2011 Pension Benefits	Jun. 29, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 01, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 29, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jul. 01, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of expense/ (income) related to net benefit expense:
Service Cost		$ 11	$ 10	$ 22	$ 20	$ 1	$ 1	$ 2	$ 2
Interest Cost		30	30	61	60	4	3	8	6
Expected Return on Plan Assets		(42)	(40)	(81)	(79)	3	2	5	3
Amortization of Net Loss		21	18	41	36
Amortization of Prior Service Costs						(1)	(1)	(1)	(1)
Net Periodic Benefit Cost		20	18	43	37	7	5	14	10
Employer contribution to qualified pension plans	275
Employer contribution to qualified pension plans, required minimum amount	$ 25