v3.5.0.2
Changes in Balance of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 26, 2016
Jun. 28, 2015
Jun. 26, 2016
Jun. 28, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total reclassified from AOCL, net of tax     $ 340 $ 425
Recognition of net actuarial losses [1]     469 554
Amortization of net prior service cost (credits) [1]     (123) (129)
Postretirement Benefit Plan Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total reclassified from AOCL, net of tax $ 173 $ 213 346 425
Recognition of net actuarial losses 235 277 469 [1] 554 [1]
Amortization of net prior service cost (credits) $ (62) $ (64) $ (123) [1] $ (129) [1]
[1] Reclassifications from AOCL, net of tax, related to our postretirement benefit plans were recorded as a component of net periodic benefit cost for each period presented (Note 7). These amounts include $173 million and $213 million for the quarters ended June 26, 2016 and June 28, 2015, which are comprised of the recognition of net actuarial losses of $235 million and $277 million for the quarters ended June 26, 2016 and June 28, 2015 and the amortization of net prior service (credits) costs of $(62) million and $(64) million for the quarters ended June 26, 2016 and June 28, 2015.