Accumulated Other Comprehensive Loss and Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Components of Accumulated other comprehensive loss
Balance at the beginning of the period	$ (1,506)	$ (1,027)
Other comprehensive loss before reclassifications	(72)	(15)
Reclassified from Accumulated other comprehensive loss	28	20
Other comprehensive income (loss)	(44)	5
Balance at the end of the period	(1,550)	(1,022)
Pension and Postretirement Benefit Adjustments
Components of Accumulated other comprehensive loss
Balance at the beginning of the period	(1,511)	(1,110)
Reclassified from Accumulated other comprehensive loss	24	18
Other comprehensive income (loss)	24	18
Balance at the end of the period	(1,487)	(1,092)
Deferred Gains/Losses on Hedge Contracts
Components of Accumulated other comprehensive loss
Balance at the beginning of the period	(13)	(10)
Other comprehensive loss before reclassifications	(16)	(9)
Reclassified from Accumulated other comprehensive loss	4	2
Other comprehensive income (loss)	(12)	(7)
Balance at the end of the period	(25)	(17)
Foreign Currency Translation Adjustments
Components of Accumulated other comprehensive loss
Balance at the beginning of the period	18	93
Other comprehensive loss before reclassifications	(56)	(6)
Other comprehensive income (loss)	(56)	(6)
Balance at the end of the period	$ (38)	$ 87