Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities
Net income (loss)	$ 10,266	$ 4,599	$ (213)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and other non-cash items	482	555	704
Net (gains) losses on investments and derivatives	168	225	300
Pension and other postretirement remeasurement (gains) losses	(35)	(37)	9
Gain on disposition of operations	(1,603)	0	0
Changes in:
Claims and claims expense and other insurance reserves	(943)	2,171	2,202
Unearned premiums	2,120	2,294	2,385
Deferred policy acquisition costs	(365)	(347)	(489)
Premium installment receivables, net	(831)	(705)	(861)
Reinsurance and indemnification recoverables, net	630	(226)	807
Income taxes	583	753	(229)
Other operating assets and liabilities	(362)	(351)	(387)
Net cash provided by operating activities	10,110	8,931	4,228
Proceeds from sales
Fixed income securities	72,897	38,751	22,973
Equity securities	6,729	3,168	5,400
Limited partnership interests	1,357	633	710
Other investments	243	265	594
Investment collections
Fixed income securities	814	1,509	1,641
Mortgage loans	127	151	81
Other investments	55	41	152
Investment purchases
Fixed income securities	(78,784)	(46,590)	(29,431)
Equity securities	(10,595)	(4,980)	(2,935)
Limited partnership interests	(1,269)	(1,434)	(890)
Mortgage loans	(242)	(113)	(145)
Other investments	(609)	(172)	(292)
Change in short-term and other investments, net	(791)	724	(617)
Purchases of property and equipment, net	(228)	(210)	(267)
Proceeds from sale of property and equipment	0	18	27
Acquisition of operations, net of cash acquired	0	(13)	0
Proceeds from disposition of operations, net of cash transferred	3,041	0	0
Net cash used in investing activities	(7,255)	(8,252)	(2,999)
Cash flows from financing activities
Proceeds from issuance of debt	0	495	743
Redemption and repayment of debt	(600)	(350)	(750)
Proceeds from issuance of preferred stock	0	0	587
Redemption of preferred stock	0	0	(575)
Contractholder fund deposits	30	129	130
Contractholder fund withdrawals	(15)	(37)	(35)
Dividends paid on common stock	(1,036)	(962)	(925)
Dividends paid on preferred stock	(117)	(117)	(107)
Treasury stock purchases	(1,233)	(2)	(335)
Shares reissued under equity incentive plans, net	48	163	73
Other	42	(16)	(49)
Net cash used in financing activities	(2,881)	(697)	(1,243)
Net decrease in cash	(26)	(18)	(14)
Cash at beginning of period	704	722	736
Cash at end of period	$ 678	$ 704	$ 722