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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
INCOME TAXES (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Earnings Before Income Taxes	$ 517	$ 1,295	$ 2,296	$ 3,250
Income Tax Expense (Benefit)	$ 135	$ 373	$ 419	$ 802	$ 2,900
Effective Income Tax Rate Reconciliation, Percent	26.10%	28.80%	18.20%	24.70%
Federal statutory tax rate			21.00%	35.00%
Increase in Effective Income Tax Rate due to Discrete Items	0.00%	0.00%		0.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount					$ 2,600
Tax Adjustments, Settlements, and Unusual Provisions			$ 29
Minimum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 350		350
Maximum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 400		$ 400