v3.7.0.1
Changes in Balance of Accumulated Other Comprehensive Loss, Net of Income Taxes (Parenthetical) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 25, 2017
Jun. 26, 2016
Jun. 25, 2017
Jun. 26, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total reclassified from AOCL     $ 409 $ 347
Recognition of net actuarial losses [1]     516 469
Amortization of net prior service credits [1]     (114) (123)
Postretirement Benefit Plan Adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total reclassified from AOCL $ 200 $ 173 402 346
Recognition of net actuarial losses 258 235 516 [1] 469 [1]
Amortization of net prior service credits $ (58) $ (62) $ (114) [1] $ (123) [1]
[1] Reclassifications from AOCL related to our postretirement benefit plans were recorded as a component of net periodic benefit cost for each period presented (see "Note 6 - Postretirement Plans"). These amounts include $200 million and $173 million, net of tax, for the quarters ended June 25, 2017 and June 26, 2016, which are comprised of the recognition of net actuarial losses of $258 million and $235 million for the quarters ended June 25, 2017 and June 26, 2016 and the amortization of net prior service credits of $(58) million and $(62) million for the quarters ended June 25, 2017 and June 26, 2016.