Annual report pursuant to Section 13 and 15(d)

SHAREOWNERS' EQUITY SHAREOWNERS' EQUITY - Reclassification from AOCI (Details)

v3.8.0.1
SHAREOWNERS' EQUITY SHAREOWNERS' EQUITY - Reclassification from AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Accumulated Net Unrealized Investment Gain (Loss) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax $ (1) $ 0 $ 0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 1 0 0
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax (5) (236) (165)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax 3 142 99
Accumulated Defined Benefit Plans Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification to earnings (net of tax effect of $67, $1,876 and $378) 731 1,783 195
Tax | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax (3) (142) (99)
Tax | Accumulated Defined Benefit Plans Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax 269 1,040 97
Net Income [Member] [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Total amount reclassified for the period (727) (1,547) (30)
Net Income [Member] [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax (1) 0 0
Net Income [Member] [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax 5 236 165
Net Income [Member] [Member] | Accumulated Defined Benefit Plans Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification to earnings (net of tax effect of $67, $1,876 and $378) (731) (1,783) (195)
Labor and Related Expense [Member] | Accumulated Defined Benefit Plans Adjustment [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax (200) (172) (174)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax (800) (2,651) (118)
Investment Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax (2) 0 0
Interest Expense [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax 1 0 0
Interest rate contracts | Interest Expense [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax (27) (26) (24)
Foreign exchange contracts | Interest Expense [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax 0 0 (25)
Foreign exchange contracts | Revenue [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax $ 35 $ 404 $ 313