Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Components of expense/ (income) related to net benefit expense:
Employer contribution to qualified pension plans, required minimum amount	$ 0
Pension Benefits [Member]
Components of expense/ (income) related to net benefit expense:
Service Cost	12,000,000	11,000,000
Interest Cost	27,000,000	31,000,000
Expected Return on Plan Assets	(40,000,000)	(39,000,000)
Amortization of Net Loss	25,000,000	20,000,000
Total Expense	24,000,000	23,000,000
Other Post-retirement Benefits [Member]
Components of expense/ (income) related to net benefit expense:
Service Cost	1,000,000	1,000,000
Interest Cost	3,000,000	4,000,000
Expected Return on Plan Assets	0	0
Amortization of Net Loss	3,000,000	2,000,000
Total Expense	$ 7,000,000	$ 7,000,000