v3.7.0.1
EQUITY - AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period     $ (5,978)  
Balance at end of period $ (5,951)   (5,951)  
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period (5,726) $ (6,026) (5,978) $ (6,360)
Other comprehensive income (loss) before reclassifications (208) 314 46 642
Amount reclassified from accumulated other comprehensive income (17) (6) (19)  
Balance at end of period (5,951) (5,718) (5,951) (5,718)
Foreign Exchange Translation Adjustment        
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period (5,473) (5,931) (5,734) (6,443)
Other comprehensive income (loss) before reclassifications (145) 469 116 981
Balance at end of period (5,618) (5,462) (5,618) (5,462)
Deferred Gains (Losses) on Hedging Activities        
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period (111) 36 (102) 214
Other comprehensive income (loss) before reclassifications (64) (155) (71) (339)
Amount reclassified from accumulated other comprehensive income (17) (6) (19)  
Balance at end of period (192) (125) (192) (125)
Pension and Other Postretirement Liability Adjustments        
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period (145) (134) (145) (134)
Balance at end of period (145) (134) (145) (134)
Unrealized Gains (Losses) on Investments        
Accumulated Other Comprehensive Income (Loss), Net of Tax        
Balance at beginning of period 3 3 3 3
Other comprehensive income (loss) before reclassifications 1   1  
Balance at end of period $ 4 $ 3 $ 4 $ 3