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HELD-FOR-SALE CLASSIFICATION AND DISCONTINUED OPERATIONS (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	May 13, 2014	Sep. 30, 2012	May 14, 2014	Dec. 31, 2014	Dec. 31, 2013
Held-for-Sale Classification and Discontinued Operations
Common stock value	$ 4,766,000,000us-gaap_CommonStockValue					$ 4,766,000,000us-gaap_CommonStockValue
Assets:
Equity securities	3,766,000,000					4,395,000,000
Short-term investments	11,961,000,000us-gaap_OtherShortTermInvestments					11,243,000,000us-gaap_OtherShortTermInvestments
Cash	1,823,000,000us-gaap_Cash	2,490,000,000us-gaap_Cash				1,758,000,000us-gaap_Cash	2,241,000,000us-gaap_Cash
Premiums and other receivables, net of allowance	13,450,000,000us-gaap_PremiumsAndOtherReceivablesNet					12,031,000,000us-gaap_PremiumsAndOtherReceivablesNet
Other assets	12,203,000,000us-gaap_OtherAssets					10,549,000,000us-gaap_OtherAssets
Liabilities:
Other liabilities	26,024,000,000us-gaap_OtherLiabilities					24,168,000,000us-gaap_OtherLiabilities
Long-term debt	31,999,000,000us-gaap_OtherLongTermDebt					31,217,000,000us-gaap_OtherLongTermDebt
Income (loss) from divested business or operations:
Income (loss) from discontinued operations, net of income tax expense	1,000,000	(47,000,000)
Aer Cap
Held-for-Sale Classification and Discontinued Operations
Common stock value	4,600,000,000
Before Tax gain on sale after settlement of intercompany loans	2,200,000,000
After-tax gain on sale on sale after settlement of intercompany loans	1,400,000,000
Percentage of common stock held after closing transaction			46.00%
Closing price per share (in dollars per share)			$ 47.01
Income (loss) from divested business or operations:
Gain (loss) on sale	2,200,000,000
AIG
Held-for-Sale Classification and Discontinued Operations
After-tax gain on sale on sale after settlement of intercompany loans				0
Net cash proceeds to AIG were after the settlement of intercompany loans	2,400,000,000
AIG \| Aer Cap
Held-for-Sale Classification and Discontinued Operations
Difference between carrying amount and equity of AerCap	1,400,000,000
Difference between carrying amount and equity of AerCap amortized into income based on estimated lives of assets and liabilities	400,000,000
AIG \| Revolving Credit Facility
Held-for-Sale Classification and Discontinued Operations
Aggregate commitment under revolving credit facility	1,000,000,000
Discontinued operations
Held-for-Sale Classification and Discontinued Operations
Before Tax gain on sale after settlement of intercompany loans	1,000,000	(1,000,000)
Income (loss) from divested business or operations:
Gain (loss) on sale	1,000,000	(1,000,000)
Income (loss) from discontinued operations, before tax expense (benefit)	1,000,000	(1,000,000)
Income tax expense (benefit)	0	46,000,000
Income (loss) from discontinued operations, net of income tax expense	1,000,000	(47,000,000)
International Lease Finance Corporation (ILFC)
Held-for-Sale Classification and Discontinued Operations
Percentage of common stock agreed to be sold					100.00%
Consideration in cash					$ 7,600,000,000
Number of shares received					97.6