INFORMATION PROVIDED IN CONNECTION WITH OUTSTANDING DEBT (Details - Condensed Consolidating Statements of Cash Flows) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Dec. 31, 2018	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ (789,000,000)	$ (38,000,000)
Cash flows from investing activities:
Sales of investments	48,471,000,000	46,533,000,000
Sale of divested businesses, net	2,000,000	10,000,000
Purchase of investments	(51,509,000,000)	(43,928,000,000)
Loans to subsidiaries - net	0	0
Contributions from (to) subsidiaries - net	0	0
Acquisition of businesses, net of cash and restricted cash acquired	0	(5,052,000,000)
Net change in short-term investments	(4,586,000,000)	2,411,000,000
Other, net	2,829,000,000	(891,000,000)
Net cash provided by (used in) investing activities	(4,793,000,000)	(917,000,000)
Cash flows from financing activities:
Issuance of long-term debt	2,564,000,000	4,059,000,000
Repayments of long-term debt	(2,421,000,000)	(2,788,000,000)
Issuance of preferred stock	485,000,000	0
Purchase of common stock	0	(994,000,000)
Intercompany loans - net	0	0
Dividends paid on preferred stock	(15,000,000)	0
Dividends paid on common stock	(835,000,000)	(858,000,000)
Other, net	6,177,000,000	1,914,000,000
Net cash provided by financing activities	5,955,000,000	1,333,000,000
Effect of exchange rate changes on cash and restricted cash	39,000,000	8,000,000
Change in cash and restricted cash	412,000,000	386,000,000
Cash and restricted cash at beginning of year	3,358,000,000	2,737,000,000
Cash and restricted cash at end of period	3,770,000,000	3,123,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			$ 3,361,000,000		$ 2,873,000,000	$ 2,741,000,000
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	3,770,000,000	2,737,000,000	3,770,000,000		3,358,000,000	3,123,000,000
Interest:
Third party	(1,012,000,000)	(1,018,000,000)
Intercompany	0	0
Taxes:
Income tax authorities	(193,000,000)	(67,000,000)
Intercompany	0	0
AIG (As Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	2,755,000,000	1,389,000,000
Cash flows from investing activities:
Sales of investments	2,090,000,000	4,641,000,000
Sale of divested businesses, net	0	0
Purchase of investments	(2,395,000,000)	(1,680,000,000)
Loans to subsidiaries - net	534,000,000	878,000,000
Contributions from (to) subsidiaries - net	(239,000,000)	22,000,000
Acquisition of businesses, net of cash and restricted cash acquired		(5,475,000,000)
Net change in short-term investments	(2,242,000,000)	1,267,000,000
Other, net	87,000,000	(55,000,000)
Net cash provided by (used in) investing activities	(2,165,000,000)	(402,000,000)
Cash flows from financing activities:
Issuance of long-term debt	595,000,000	2,470,000,000
Repayments of long-term debt	(1,006,000,000)	(1,493,000,000)
Issuance of preferred stock	485,000,000
Purchase of common stock	0	(994,000,000)
Intercompany loans - net	127,000,000	50,000,000
Dividends paid on preferred stock	(15,000,000)
Dividends paid on common stock	(835,000,000)	(858,000,000)
Other, net	(63,000,000)	(165,000,000)
Net cash provided by financing activities	(712,000,000)	(990,000,000)
Effect of exchange rate changes on cash and restricted cash	0	0
Change in cash and restricted cash	(122,000,000)	(3,000,000)
Cash and restricted cash at beginning of year	127,000,000	8,000,000
Cash and restricted cash at end of period	5,000,000	5,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			3,000,000		2,000,000	3,000,000
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	127,000,000	8,000,000	5,000,000		127,000,000	5,000,000
Interest:
Third party	(735,000,000)	(706,000,000)
Intercompany	(2,000,000)	(1,000,000)
Taxes:
Income tax authorities	(12,000,000)	(23,000,000)
Intercompany	1,035,000,000	1,084,000,000
Non-cash financing and investing activities:
Return of capital	15,000,000	2,706,000,000
Dividends received in the form of securities	659,000,000	745,000,000
Capital contributions	15,000,000	2,339,000,000
Validus Holdings, Ltd
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	101,000,000	(40,000,000)
Cash flows from investing activities:
Sales of investments	0	0
Sale of divested businesses, net	0	0
Purchase of investments	0	0
Loans to subsidiaries - net	0	0
Contributions from (to) subsidiaries - net	0	0
Acquisition of businesses, net of cash and restricted cash acquired		112,000,000
Net change in short-term investments	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	0	112,000,000
Cash flows from financing activities:
Issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Issuance of preferred stock	0
Purchase of common stock	0	0
Intercompany loans - net	0	0
Dividends paid on preferred stock	0
Dividends paid on common stock	(90,000,000)	(6,000,000)
Other, net	0	0
Net cash provided by financing activities	(90,000,000)	(6,000,000)
Effect of exchange rate changes on cash and restricted cash	0	0
Change in cash and restricted cash	11,000,000	66,000,000
Cash and restricted cash at beginning of year	9,000,000	0
Cash and restricted cash at end of period	20,000,000	66,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			20,000,000		9,000,000	66,000,000
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	9,000,000	0	20,000,000		9,000,000	66,000,000
Interest:
Third party	(22,000,000)	14,000,000
Intercompany	(31,000,000)	0
Taxes:
Income tax authorities	0	0
Intercompany	2,000,000	0
AIGLH
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1,462,000,000	2,003,000,000
Cash flows from investing activities:
Sales of investments	0	0
Sale of divested businesses, net	0	0
Purchase of investments	0	0
Loans to subsidiaries - net	0	0
Contributions from (to) subsidiaries - net	0	0
Acquisition of businesses, net of cash and restricted cash acquired		0
Net change in short-term investments	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	0	0
Cash flows from financing activities:
Issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Issuance of preferred stock	0
Purchase of common stock	0	0
Intercompany loans - net	0	0
Dividends paid on preferred stock	0
Dividends paid on common stock	(1,470,000,000)	(2,020,000,000)
Other, net	0	0
Net cash provided by financing activities	(1,470,000,000)	(2,020,000,000)
Effect of exchange rate changes on cash and restricted cash	0	0
Change in cash and restricted cash	(8,000,000)	(17,000,000)
Cash and restricted cash at beginning of year	9,000,000	20,000,000
Cash and restricted cash at end of period	1,000,000	3,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			1,000,000		9,000,000	3,000,000
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	9,000,000	20,000,000	1,000,000		9,000,000	3,000,000
Interest:
Third party	(48,000,000)	(47,000,000)
Intercompany	0	1,000,000
Taxes:
Income tax authorities	0	0
Intercompany	0	0
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(1,068,000,000)	(433,000,000)
Cash flows from investing activities:
Sales of investments	46,921,000,000	45,218,000,000
Sale of divested businesses, net	2,000,000	10,000,000
Purchase of investments	(49,654,000,000)	(45,574,000,000)
Loans to subsidiaries - net	(127,000,000)	(50,000,000)
Contributions from (to) subsidiaries - net	0	0
Acquisition of businesses, net of cash and restricted cash acquired		311,000,000
Net change in short-term investments	(2,344,000,000)	1,144,000,000
Other, net	2,742,000,000	(836,000,000)
Net cash provided by (used in) investing activities	(2,460,000,000)	223,000,000
Cash flows from financing activities:
Issuance of long-term debt	1,969,000,000	1,589,000,000
Repayments of long-term debt	(1,415,000,000)	(1,295,000,000)
Issuance of preferred stock	0
Purchase of common stock	0	0
Intercompany loans - net	(534,000,000)	(878,000,000)
Dividends paid on preferred stock	0
Dividends paid on common stock	(2,479,000,000)	(931,000,000)
Other, net	6,479,000,000	2,057,000,000
Net cash provided by financing activities	4,020,000,000	542,000,000
Effect of exchange rate changes on cash and restricted cash	39,000,000	8,000,000
Change in cash and restricted cash	531,000,000	340,000,000
Cash and restricted cash at beginning of year	3,213,000,000	2,709,000,000
Cash and restricted cash at end of period	3,744,000,000	3,049,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			3,337,000,000		2,853,000,000	2,669,000,000
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	3,213,000,000	2,709,000,000	3,744,000,000		3,213,000,000	3,049,000,000
Interest:
Third party	(207,000,000)	(279,000,000)
Intercompany	(29,000,000)	2,000,000
Taxes:
Income tax authorities	(181,000,000)	(44,000,000)
Intercompany	(1,037,000,000)	(1,084,000,000)
Other assets
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			345,000,000	[1]	343,000,000	354,000,000	[1]
Other assets | AIG (As Guarantor)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			1,000,000		1,000,000	1,000,000
Other assets | Validus Holdings, Ltd
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			0			0
Other assets | AIGLH
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			0			0
Other assets | Other Subsidiaries
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			344,000,000		342,000,000	353,000,000
Short-term investments
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			64,000,000	[1]	142,000,000	28,000,000	[1]
Short-term investments | AIG (As Guarantor)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			1,000,000		124,000,000	1,000,000
Short-term investments | Validus Holdings, Ltd
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			0			0
Short-term investments | AIGLH
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			0			0
Short-term investments | Other Subsidiaries
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			63,000,000		18,000,000	27,000,000
Reclassification and Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(4,039,000,000)	(2,957,000,000)
Cash flows from investing activities:
Sales of investments	(540,000,000)	(3,326,000,000)
Sale of divested businesses, net	0	0
Purchase of investments	540,000,000	3,326,000,000
Loans to subsidiaries - net	(407,000,000)	(828,000,000)
Contributions from (to) subsidiaries - net	239,000,000	(22,000,000)
Acquisition of businesses, net of cash and restricted cash acquired		0
Net change in short-term investments	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	(168,000,000)	(850,000,000)
Cash flows from financing activities:
Issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Issuance of preferred stock	0
Purchase of common stock	0	0
Intercompany loans - net	407,000,000	828,000,000
Dividends paid on preferred stock	0
Dividends paid on common stock	4,039,000,000	2,957,000,000
Other, net	(239,000,000)	22,000,000
Net cash provided by financing activities	4,207,000,000	3,807,000,000
Effect of exchange rate changes on cash and restricted cash	0	0
Change in cash and restricted cash	0	0
Cash and restricted cash at beginning of year	0	0
Cash and restricted cash at end of period	0	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Cash			0		0	0
Total cash and restricted cash shown in the Condensed Consolidated Cash Flows	0	0	0		$ 0	0
Interest:
Third party	0	0
Intercompany	0	0
Taxes:
Income tax authorities	0	0
Intercompany	$ 0	$ 0
Reclassification and Eliminations | Other assets
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			0			0
Reclassification and Eliminations | Short-term investments
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract]
Restricted cash			$ 0			$ 0

[1] Includes funds held for tax sharing payments to AIG Parent, security deposits, and replacement reserve deposits related to our affordable housing investments.