INCOME TAXES (Details - Accounting For Uncertainty in Income Taxes) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rollforward of the beginning and ending balances of the total amounts of gross unrecognized tax benefits
Gross unrecognized tax benefits, beginning of year	$ 4,530	$ 4,331	$ 4,395
Increases in tax positions for prior years	210	235	162
Decreases in tax positions for prior years	(33)	(39)	(209)
Increases in tax positions for current year	0	3	0
Lapse in statute of limitations	0	0	(4)
Settlements	0	0	(13)
Activity of discontinued operations	0	0	0
Gross unrecognized tax benefits, end of year	4,707	4,530	4,331
Unrecognized tax benefits, if recognized would not affect the effective tax rate	28	66	115
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate	4,700	4,400	4,200
Unrecognized tax benefits, interest and penalties accrued	2,000	1,200	1,200
Unrecognized tax benefits, interest net of the federal benefit (expense) and penalties	776	$ 26	$ 156
Decrease in Unrecognized Tax Benefits is Reasonably Possible in the next twelve months	$ 3,900