Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013
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	11,000,000	12,000,000
Interest Cost	31,000,000	27,000,000
Expected Return on Plan Assets	(41,000,000)	(40,000,000)
Amortization of Net Loss	14,000,000	25,000,000
Total Expense	15,000,000	24,000,000
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	3,000,000
Amortization of Net Loss	1,000,000	3,000,000
Total Expense	$ 5,000,000	$ 7,000,000