Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Components of expense/ (income) related to net benefit expense:
Employer contribution to qualified pension plans	$ 275
Employer contribution to qualified pension plans, required minimum amount	25
Pension Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	11	10
Interest Cost	31	30
Expected Return on Plan Assets	(39)	(39)
Amortization of Net Loss	20	18
Net Periodic Benefit Cost	23	19
Other Post-Retirement Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	1	1
Interest Cost	4	3
Expected Return on Plan Assets	0	0
Amortization of Net Loss	2	1
Net Periodic Benefit Cost	$ 7	$ 5