Shareholders' Equity (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	$ (1,770)	$ (1,625)
Other comprehensive income (loss) before reclassifications	623	(217)
Amounts reclassified from Accumulated Other Comprehensive Loss	120	72
Other comprehensive income	743	(145)
Balance at the end of the period	(1,027)	(1,770)
Foreign Currency Translation Adjustments
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	81	79
Other comprehensive income (loss) before reclassifications	12	2
Other comprehensive income	12	2
Balance at the end of the period	93	81
Pension and Post Retirement Benefit Adjustments
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	(1,857)	(1,711)
Other comprehensive income (loss) before reclassifications	626	(230)
Amounts reclassified from Accumulated Other Comprehensive Loss	121	84
Other comprehensive income	747	(146)
Balance at the end of the period	(1,110)	(1,857)
Deferred Gains/Losses on Hedge Contracts
Components of Accumulated Other Comprehensive Loss
Balance at the beginning of the period	6	7
Other comprehensive income (loss) before reclassifications	(15)	11
Amounts reclassified from Accumulated Other Comprehensive Loss	(1)	(12)
Other comprehensive income	(16)	(1)
Balance at the end of the period	$ (10)	$ 6