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INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent [Abstract]        
Federal statutory rate   35.00% 35.00% 35.00%
State income taxes, net of federal benefit   1.10% 1.80% 1.70%
Non-U.S. income tax rate differential   (1.60%) (3.60%) (4.60%)
Audit settlements   0.00% (0.60%) (1.70%)
Effect of tax law changes   99.70% 0.00% 0.40%
Basis difference in affiliates   (2.10%) (0.10%) (0.00%)
Tax advantaged investments   (2.20%) (2.40%) (1.80%)
Other, net   (0.80%) (0.10%) 1.00%
Effective income tax rate   129.10% 30.00% 30.00%
Impact of non-cash charge related to Tax Reform $ 22,600 $ 22,594    
DTA change in enacted tax rate       $ 101
Effect income tax rate before effect of Tax Cuts and Jobs Act   29.80%