Accumulated Other Comprehensive Loss and Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	$ (1,770)	$ (1,625)
Other comprehensive income before reclassifications	(20)	(7)
Amounts reclassified from Accumulated Other Comprehensive Loss	61	33
Other comprehensive income	41	26
Balance at the end of the period	(1,729)	(1,599)
Foreign Currency Translation Adjustment
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	81	79
Other comprehensive income before reclassifications	(9)	(13)
Other comprehensive income	(9)	(13)
Balance at the end of the period	72	66
Pension 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	63	42
Other comprehensive income	63	42
Balance at the end of the period	(1,794)	(1,669)
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	(11)	6
Amounts reclassified from Accumulated Other Comprehensive Loss	(2)	(9)
Other comprehensive income	(13)	(3)
Balance at the end of the period	$ (7)	$ 4