Condensed Consolidated Balance Sheets - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020
Fixed maturity securities:
Bonds available for sale, at fair value, net of allowance for credit losses of $97 in 2021 and $186 in 2020 (amortized cost: 2021 - $251,620; 2020 - $244,337)	[1]	$ 273,070	$ 271,496
Other bond securities, at fair value (See Note 5)	[1]	4,866	5,291
Equity Securities, at fair value (See Note 5)	[1]	1,079	1,056
Mortgage and other loans receivable, net of allowance for credit losses of $701 in 2021 and $814 in 2020	[1]	45,216	45,562
Other invested assets (portion measured at fair value: 2021 - $9,580; 2020 - $8,422)	[1]	20,139	19,060
Short-term investments, including restricted cash of $59 in 2021 and $180 in 2020 (portion measured at fair value: 2021 - $5,523; 2020 - $5,968)	[1]	15,169	18,203
Total investments		359,539	360,668
Cash	[1]	2,760	2,827
Accrued investment income	[1]	2,288	2,271
Premiums and other receivables, net of allowance for credit losses and disputes of $198 in 2021 and $205 in 2020		14,303	11,333
Reinsurance assets, net of allowance for credit losses and disputes		41,344	38,963
Deferred income taxes		12,628	12,624
Deferred policy acquisition costs		10,723	9,805
Other assets, net of allowance for credit losses of $49 in 2021 and $49 in 2020, including restricted cash of $242 in 2021 and $223 in 2020 (portion measured at fair value: 2021 - $1,145; 2020 - $887)	[1]	13,267	13,122
Separate account assets, at fair value		107,306	100,290
Total assets		598,250	586,481
Liabilities:
Liability for unpaid losses and loss adjustment expenses, including allowance for credit losses of $14 in 2021 and $14 in 2020		78,981	77,720
Unearned premiums		21,487	18,660
Future policy benefits for life and accident and health insurance contracts		51,771	51,097
Policyholder contract deposits (portion measured at fair value: 2021 - $9,020; 2020 - $9,798)		161,112	160,251
Other policyholder funds		3,516	3,548
Fortitude Re funds withheld payable (portion measured at fair value: 2021 - $5,317; 2020 - $6,042)		41,403	43,060
Other liabilities (portion measured at fair value: 2021 - $741; 2020 - $570)	[1]	30,039	27,122
Long-term debt	[1]	26,161	28,103
Separate account liabilities		107,306	100,290
Total liabilities		531,342	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 - 1,051,743,562 shares; 2020 - 1,045,113,443 shares of common stock		(49,634)	(49,322)
Additional paid-in capital		81,322	81,418
Retained earnings		18,935	15,504
Accumulated other comprehensive income		10,209	13,511
Total AIG shareholders' equity		66,083	66,362
Non-redeemable noncontrolling interests		825	837
Total equity		66,908	67,199
Total liabilities and equity		598,250	586,481
Fortitude
Fixed maturity securities:
Reinsurance assets, net of allowance for credit losses and disputes		34,092	34,578
Debt of consolidated investments
Liabilities:
Long-term debt	[1]	$ 9,566	$ 9,431

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