Condensed Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Fixed maturity securities:
Bonds available for sale, at fair value, net of allowance for credit losses of $66 in 2021 and $186 in 2020 (amortized cost: 2021 - $254,925; 2020 - $244,337)	[1]	$ 274,341	$ 271,496
Other bond securities, at fair value (See Note 5)	[1]	4,651	5,291
Equity Securities, at fair value (See Note 5)	[1]	1,035	1,056
Mortgage and other loans receivable, net of allowance for credit losses of $641 in 2021 and $814 in 2020	[1]	45,821	45,562
Other invested assets (portion measured at fair value: 2021 - $10.037; 2020 - $8,422)	[1]	15,977	19,060
Short-term investments, including restricted cash of $77 in 2021 and $180 in 2020 (portion measured at fair value: 2021 - $5,640; 2020 - $5,968)	[1]	13,771	18,203
Total investments		355,596	360,668
Cash	[1]	2,699	2,827
Accrued investment income	[1]	2,312	2,271
Premiums and other receivables, net of allowance for credit losses and disputes of $194 in 2021 and $205 in 2020		13,593	11,333
Deferred income taxes		12,385	12,624
Deferred policy acquisition costs		10,607	9,805
Other assets, net of allowance for credit losses of $49 in 2021 and $49 in 2020, including restricted cash of $58 in 2021 and $223 in 2020 (portion measured at fair value: 2021 - $998; 2020 - $887)	[1]	17,429	13,122
Separate account assets, at fair value		105,423	100,290
Total assets		594,800	586,481
Liabilities:
Liability for unpaid losses and loss adjustment expenses, including allowance for credit losses of $14 in 2021 and $14 in 2020		79,274	77,720
Unearned premiums		21,245	18,660
Future policy benefits for life and accident and health insurance contracts		57,777	56,878
Policyholder contract deposits (portion measured at fair value: 2021 - $9.273; 2020 - $9,798)		156,623	154,470
Other policyholder funds		3,542	3,548
Fortitude Re funds withheld payable (portion measured at fair value: 2021 - $5,443; 2020 - $6,042)		40,888	43,060
Other liabilities (portion measured at fair value: 2021 - $703; 2020 - $570)	[1]	32,819	27,122
Separate account liabilities		105,423	100,290
Total liabilities		529,141	519,282
Contingencies, commitments and guarantees (see Note 11)
AIG shareholders' equity:
Series A non-cumulative preferred stock and additional paid in capital, $5.00 par value; 100,000,000 shares authorized; shares issued: 2021 - 20,000 and 2020 - 20,000; liquidation preference $500		485	485
Common stock, $2.50 par value; 5,000,000,000 shares authorized; shares issued: 2021 - 1,906,671,492 and 2020 - 1,906,671,492		4,766	4,766
Treasury stock, at cost; 2021 - 1,070,875,441 shares; 2020 - 1,045,113,443 shares of common stock		(50,641)	(49,322)
Additional paid-in capital		81,327	81,418
Retained earnings		20,320	15,504
Accumulated other comprehensive income		8,606	13,511
Total AIG shareholders' equity		64,863	66,362
Non-redeemable noncontrolling interests		796	837
Total equity		65,659	67,199
Total liabilities and equity		594,800	586,481
Excluding Fortitude
Fixed maturity securities:
Reinsurance assets, net of allowance for credit losses and disputes		41,062	38,963
Fortitude
Fixed maturity securities:
Reinsurance assets, net of allowance for credit losses and disputes		33,694	34,578
American International Group, Inc.
Liabilities:
Long-term debt		24,582	28,103
Debt of consolidated investments
Liabilities:
Long-term debt	[1]	$ 6,968	$ 9,431

[1] See Note 8 for details of balances associated with variable interest entities.