Annual report pursuant to Section 13 and 15(d)

SHAREOWNERS' EQUITY - Activity in Accumulated Other Comprehensive Income (Loss) (Detail)

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SHAREOWNERS' EQUITY - Activity in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year $ (4,483) $ (3,540)  
Translation adjustment (net of tax effect of $(161), $32 and $0) 86 (119) $ (440)
Current period changes in fair value (net of tax effect of $(1), $0, and $(1)) (1) 0 (1)
Current period changes in fair value (net of tax effect of $(190), $75, and $103) (321) (112) 6
Balance at end of period (4,867) (4,483) (3,540)
Foreign currency translation gain (loss)      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1,016) (897) (457)
Translation adjustment (net of tax effect of $(161), $32 and $0) 86 (119) (440)
Balance at end of period (930) (1,016) (897)
Unrealized gain (loss) on marketable securities, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1) (1) 0
Current period changes in fair value (net of tax effect of $(1), $0, and $(1)) (2) 0 (1)
Reclassification to earnings (net of tax effect of $1, $0, and $0) 1 0 0
Balance at end of period (2) (1) (1)
Unrealized gain (loss) on cash flow hedges, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (45) 67 61
Current period changes in fair value (net of tax effect of $(190), $75, and $103) (316) 124 171
Reclassification to earnings (net of tax effect of $(3), $(142), and $(99)) (5) (236) (165)
Balance at end of period (366) (45) 67
Unrecognized pension and postretirement benefit costs, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (3,421) (2,709) (3,198)
Reclassification to earnings (net of tax effect of $269, $1,040, and $97) 731 1,783 195
Net actuarial gain (loss) and prior service cost resulting from remeasurements of plan assets and liabilities (net of tax effect of $(180), $(1,460), and $197) (879) (2,495) 294
Balance at end of period (3,569) (3,421) (2,709)
Net Income [Member] [Member] | Unrealized gain (loss) on marketable securities, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Reclassification to earnings (net of tax effect of $1, $0, and $0) (1) 0 0
Net Income [Member] [Member] | Unrealized gain (loss) on cash flow hedges, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Reclassification to earnings (net of tax effect of $(3), $(142), and $(99)) 5 236 165
Net Income [Member] [Member] | Unrecognized pension and postretirement benefit costs, net of tax      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Reclassification to earnings (net of tax effect of $269, $1,040, and $97) $ (731) $ (1,783) $ (195)