Changes in Balance of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013		Sep. 30, 2012
Schedule of Postretirement Benefit Plans and Other Adjustments Recognized in Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial gains (losses)	$ (243)	$ (240)	$ (730)	[1]	$ (626)	[1]
Prior service cost	$ 11	$ 9	$ 31	[1]	$ 29	[1]

[1] Amounts related to our postretirement benefit plans that were reclassified from AOCL were recorded as a component of net periodic benefit cost for each period presented (Note 5). These amounts include the amortization of net actuarial losses of $243 million and $240 million for the quarters ended September 29, 2013 and September 30, 2012 and prior service cost of $11 million and $9 million for the quarters ended September 29, 2013 and September 30, 2012.