v3.6.0.2
Supplemental Equity and Comprehensive Income Information - Reclass AOCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Sales or impairments of securities $ 6,111 $ 6,182 $ 6,469
Net of tax (203) (250) (236)
Gains (losses) associated with defined benefit pension and postretirement plans amortization      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Transition asset 1 1 1
Prior service benefit 92 79 59
Net actuarial loss (506) (626) (420)
Curtailments/Settlements (8) 9  
Total before tax (421) (537) (360)
Tax effect 148 176 122
Net of tax (273) (361) (238)
Debt and equity security gains (losses)      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Sales or impairments of securities     (1)
Total before tax     (1)
Net of tax     (1)
Cash flow hedging instruments gains (losses)      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Total before tax 109 174 4
Tax effect (39) (63) (1)
Net of tax 70 111 3
Cash flow hedging instruments gains (losses) | Foreign currency forward/option contracts      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Cost of sales 110 178 3
Cash flow hedging instruments gains (losses) | Commodity price swap contracts      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Cost of sales   (2) 2
Cash flow hedging instruments gains (losses) | Interest rate swap contracts      
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]      
Interest expense $ (1) $ (2) $ (1)