CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassification out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	[1]	$ (183)	$ (84)	$ (490)	$ (212)
Income from continuing operations before income taxes		(6,894)	(2,174)	(13,831)	(8,257)
Tax effect		2,036	1,921	4,156	4,052
Income from continuing operations		(4,858)	(253)	(9,675)	(4,205)
(Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes		43	136	(42)	373
Tax effect		(25)	(54)	5	(140)
Income from continuing operations		18	82	(37)	233
(Gain) loss reclassified from AOCI | Realized gains (losses) on investment securities
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments		(183)	(84)	(490)	(212)
OTTI gross impairment losses		43	37	115	238
Income from continuing operations before income taxes		(140)	(47)	(375)	26
Tax effect		49	16	134	(7)
Income from continuing operations		(91)	(31)	(241)	19
(Gain) loss reclassified from AOCI | Cash flow hedges
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes		111	101	197	218
Tax effect		(41)	(39)	(73)	(84)
Income from continuing operations		70	62	124	134
(Gain) loss reclassified from AOCI | Cash flow hedges | Interest rate
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes		74	73	120	134
(Gain) loss reclassified from AOCI | Cash flow hedges | Foreign exchange contracts
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations before income taxes		37	28	77	84
(Gain) loss reclassified from AOCI | Pension liability adjustments
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Amortization of unrecognized prior service cost (benefit)		(10)	(10)	(21)	(19)
Amortization of unrecognized Net actuarial loss		72	64	147	120
Curtailment/settlement impact		10	28	10	28
Income from continuing operations before income taxes		72	82	136	129
Tax effect		(33)	(31)	(56)	(49)
Income from continuing operations		39	51	80	80
(Gain) loss reclassified from AOCI | Foreign currency translation adjustment
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Income from continuing operations		$ 0	$ 0	$ 0	$ 0

[1] Certain prior-period revenue and expense lines and totals were reclassified to conform to the current period’s presentation. See Note 3 to the Consolidated Financial Statements.