CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	$ (136)		$ (63)		$ (348)		$ (764)
Income from continuing operations before income taxes	(4,899)		(4,266)		(12,991)		(16,082)
Tax effect	1,985		1,080		5,873		4,777
Income from continuing operations	(2,914)	[1]	(3,186)	[1]	(7,118)	[1]	(11,305)	[1]
(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	154		286		527		416
Tax effect	(64)		(111)		(204)		(180)
Income from continuing operations	90		175		323		236
Realized gains (losses) on investment securities | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Realized (gains) losses on sales of investments	(136)		(63)		(348)		(764)
OTTI gross impairment losses	91		39		329		270
Income from continuing operations before income taxes	(45)		(24)		(19)		(494)
Tax effect	11		9		4		170
Income from continuing operations	(34)	[2]	(15)	[2]	(15)	[2]	(324)	[2]
Cash flow hedges | (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	114		249		332		720
Tax effect	(44)		(96)		(128)		(277)
Income from continuing operations	70	[3]	153	[3]	204	[3]	443	[3]
Cash flow hedges | Interest rate | (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	84		211		218		596
Cash flow hedges | Foreign exchange contracts | (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	30		38		114		124
Pension liability adjustments | (Gain) loss reclassified from AOCI
Pretax and after-tax amounts reclassified out of accumulated other comprehensive income (loss)
Amortization of unrecognized prior service cost (benefit)	(11)		2		(30)		7
Amortization of unrecognized Net actuarial loss	63		61		183		205
Curtailment/settlement impact	33	[4]	(2)	[4]	61	[4]	(2)	[4]
Cumulative effect of change in accounting policy			0	[4]			(20)	[4]
Income from continuing operations before income taxes	85		61		214		190
Tax effect	(31)		(24)		(80)		(73)
Income from continuing operations	$ 54	[4]	$ 37	[4]	$ 134	[4]	$ 117	[4]

[1] Includes pretax provisions (credits) for credit losses and for benefits and claims in the GCB results of $1.4 billion and $1.7 billion; in the ICG results of $(21) million and $139 million; and in Citi Holdings results of $0.4 billion and $0.1 billion for the three months ended September 30, 2014 and 2013, respectively. Includes pretax provisions (credits) for credit losses and for benefits and claims in the GCB results of $4.5 billion and $5.0 billion; in the ICG results of $(106) million and $174 million; and in Citi Holdings results of $1.0 billion and $1.3 billion for the nine months ended September 30, 2014 and 2013, respectively.

[2] The pretax amount is reclassified to Realized gains (losses) on sales of investments, net and Gross impairment losses on the Consolidated Statement of Income. See Note 13 to the Consolidated Financial Statements for additional details.

[3] See Note 21 to the Consolidated Financial Statements for additional details.

[4] See Notes 1 and 8 to the Consolidated Financial Statements for additional details.