Quarterly report pursuant to Section 13 or 15(d)

Activity in Accumulated Other Comprehensive Income (Loss) (Detail)

v3.2.0.727
Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     $ (3,594)  
Aggregate adjustment for the period (net of tax effect of $0 and $(9)) $ 101 $ 39 (203) $ 3
Current period changes in fair value (net of tax effect of $0, and $2) (1) 2 1 2
Current period changes in fair value (net of tax effect of $(25) and $(32)) (159) (21) 17 (41)
Balance at end of period (3,727) (596) (3,727) (596)
Foreign currency translation gain (loss):        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (457) (126)
Aggregate adjustment for the period (net of tax effect of $0 and $(9))     (203) 3
Balance at end of period (660) (123) (660) (123)
Unrealized gain (loss) on marketable securities, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     0 (1)
Current period changes in fair value (net of tax effect of $0, and $2)     1 2
Reclassification to earnings (net of tax effect of $(1) and $(4))     0 0
Balance at end of period 1 1 1 1
Unrealized gain (loss) on cash flow hedges, net of tax:        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     61 (219)
Current period changes in fair value (net of tax effect of $(25) and $(32))     91 (44)
Reclassification to earnings (net of tax effect of $0 and $(6))     (74) 3
Balance at end of period 78 (260) 78 (260)
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     (3,198) (114)
Reclassification to earnings (net of tax effect of $16 and $28)     52 715
Balance at end of period $ (3,146) $ (214) (3,146) (214)
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax     $ 0 $ (815)