Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net income (loss)	$ 4,599	$ (213)	$ (1,342)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and other non-cash items	555	704	847
Net (gains) losses on investments and derivatives	225	300	1,072
Pension and other postretirement remeasurement (gains) losses	(37)	9	116
Changes in:
Policy benefits and other insurance reserves	2,171	2,202	4,445
Unearned premiums	2,294	2,385	2,539
Deferred policy acquisition costs	(347)	(489)	(713)
Premium installment receivables, net	(705)	(861)	(1,038)
Reinsurance recoverables, net	(226)	807	451
Income taxes	753	(229)	(715)
Other operating assets and liabilities	(351)	(387)	(541)
Net cash provided by operating activities	8,931	4,228	5,121
Proceeds from sales
Fixed income securities	38,751	22,973	31,494
Equity securities	3,168	5,400	10,969
Limited partnership interests	633	710	970
Other investments	265	594	1,071
Investment collections
Fixed income securities	1,509	1,641	728
Mortgage loans	151	81	163
Other investments	41	152	167
Investment purchases
Fixed income securities	(46,590)	(29,431)	(36,920)
Equity securities	(4,980)	(2,935)	(9,294)
Limited partnership interests	(1,434)	(890)	(1,258)
Mortgage loans	(113)	(145)	(104)
Other investments	(172)	(292)	(295)
Change in short-term and other investments, net	724	(617)	792
Purchases of property and equipment, net	(210)	(267)	(420)
Proceeds from sale of property and equipment	18	27	209
Acquisition of operations, net of cash acquired	(13)	0	0
Net cash used in investing activities	(8,252)	(2,999)	(1,728)
Cash flows from financing activities
Proceeds from issuance of debt	495	743	0
Redemption and repayment of debt	(350)	(750)	0
Proceeds from issuance of preferred stock	0	587	0
Redemption of preferred stock	0	(575)	0
Contractholder fund deposits	129	130	133
Contractholder fund withdrawals	(37)	(35)	(49)
Dividends paid on common stock	(962)	(925)	(926)
Dividends paid on preferred stock	(117)	(107)	(105)
Treasury stock purchases	(2)	(335)	(2,520)
Shares reissued under equity incentive plans, net	163	73	82
Other	(16)	(49)	(35)
Net cash used in financing activities	(697)	(1,243)	(3,420)
Net decrease in cash	(18)	(14)	(27)
Cash at beginning of period	722	736	763
Cash at end of period	$ 704	$ 722	$ 736