Schedule II - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 3,273		$ 6,243		$ 4,134
Cash flows from investing activities:
Sales and maturities of investments	6,588		960		1,004
Sales of divested businesses	587		2,568		0
Other, net	(66)		(1,754)		(1,097)
Net cash provided by (used in) investing activities	1,672		(7,021)		(3,626)
Cash flows from financing activities:
Redemption of preferred stock	(485)		0		0
Dividends on preferred stock and preferred stock redemption premiums	(22)		(29)		(29)
Cash dividends paid on common stock	(1,002)		(997)		(982)
Purchase of common stock	(6,652)		(2,961)		(5,200)
Other, net	605		2,846		1,369
Net cash provided by (used in) financing activities	(5,063)		782		(602)
Cash and restricted cash at beginning of year	1,573		1,571
Cash and restricted cash at end of year	1,372		1,573		1,571
Supplementary Disclosure of Condensed Consolidated Cash Flow Information
Cash	1,302		1,540		1,482
Restricted cash	55	[1]	1	[1]	70
Restricted cash included in Other assets	15	[1]	32	[1]	19
Total cash and restricted cash shown in Statements of Cash Flows – Parent Company Only	1,372		1,573		1,571	$ 1,877
Total cash and restricted cash shown in the Consolidated Statements of Cash Flows	1,372		1,573		1,571
Interest	858		1,059		1,127
Taxes	708		984		746
Parent Company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	3,367		4,309		(562)
Cash flows from investing activities:
Sales and maturities of investments	6,018		3,367		13,505
Purchase of investments	(353)		(2,070)		(90)
Net change in short-term investments	(523)		(4,393)		945
Contributions from (to) subsidiaries - net	(12)		(47)		(330)
Loans to subsidiaries - net	0		84		127
Other, net	278		1,025		798
Net cash provided by (used in) investing activities	5,408		(2,034)		14,955
Cash flows from financing activities:
Issuance of long-term debt	660		742		0
Repayments of debt	(2,047)		(2,037)		(9,364)
Redemption of preferred stock	(485)		0		0
Dividends on preferred stock and preferred stock redemption premiums	(22)		(29)		(29)
Cash dividends paid on common stock	(1,002)		(997)		(982)
Loans from subsidiaries - net	0		(97)		(224)
Purchase of common stock	(6,652)		(2,961)		(5,200)
Other, net	822		3,108		1,408
Net cash provided by (used in) financing activities	(8,726)		(2,271)		(14,391)
Change in cash and restricted cash	49		4		2
Cash and restricted cash at beginning of year	10		6		4
Cash and restricted cash at end of year	59		10		6
Supplementary Disclosure of Condensed Consolidated Cash Flow Information
Cash	4		10		5
Restricted cash	55
Restricted cash included in Other assets	0		0		1
Total cash and restricted cash shown in Statements of Cash Flows – Parent Company Only	59		10		6
Total cash and restricted cash shown in the Consolidated Statements of Cash Flows	59		10		6	$ 4
Interest	(611)		(455)		(653)
Intercompany	1		(3)		0
Taxes	(231)		(109)		(348)
Intercompany	248		399		92
Intercompany non-cash financing and investing activities:
Capital contributions	371		861		473
Dividends received in the form of securities	$ 0		$ 314		$ 494

[1] Includes funds held for tax sharing payments to AIG Parent, security deposits, and replacement reserve deposits related to real estate.