Accumulated Other Comprehensive Loss and Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	$ (1,770)	$ (1,625)
Other comprehensive income before reclassifications	(6)	10
Amounts reclassified from Accumulated Other Comprehensive Loss	125	53
Other comprehensive income	119	63
Balance at the end of the period	(1,651)	(1,562)
Foreign Currency Translation Adjustments
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	81	79
Other comprehensive income before reclassifications	3	(5)
Other comprehensive income	3	(5)
Balance at the end of the period	84	74
Pension and Post Retirement Benefit Adjustments
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	(1,857)	(1,711)
Amounts reclassified from Accumulated Other Comprehensive Loss	127	63
Other comprehensive income	127	63
Balance at the end of the period	(1,730)	(1,648)
Deferred Gains/Losses on Hedge Contracts
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	6	7
Other comprehensive income before reclassifications	(9)	15
Amounts reclassified from Accumulated Other Comprehensive Loss	(2)	(10)
Other comprehensive income	(11)	5
Balance at the end of the period	$ (5)	$ 12