Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net income (loss)	$ 1,545	$ (1,696)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, amortization and other non-cash items	264	363
Net (gains) losses on investments and derivatives	267	137
Pension and other postretirement remeasurement (gains) losses	(11)	(93)
Changes in:
Policy benefits and other insurance reserves	1,750	2,917
Unearned premiums	1,262	1,032
Deferred policy acquisition costs	(175)	(162)
Premium installment receivables, net	(745)	(532)
Reinsurance recoverables, net	76	468
Income taxes	91	(538)
Other operating assets and liabilities	(299)	(126)
Net cash provided by operating activities	4,025	1,770
Proceeds from sales
Fixed income securities	15,463	12,454
Equity securities	1,510	4,183
Limited partnership interests	248	516
Other investments	120	81
Investment collections
Fixed income securities	1,002	992
Mortgage loans	10	36
Other investments	19	53
Investment purchases
Fixed income securities	(20,376)	(15,875)
Equity securities	(1,257)	(1,717)
Limited partnership interests	(560)	(424)
Mortgage loans	(1)	(100)
Other investments	(59)	(140)
Change in short-term and other investments, net	64	(986)
Purchases of property and equipment, net	(97)	(141)
Proceeds from sale of property and equipment	18	19
Net cash used in investing activities	(3,896)	(1,049)
Cash flows from financing activities
Proceeds from issuance of debt	495	743
Redemption and repayment of debt	(350)	(750)
Proceeds from issuance of preferred stock	0	587
Redemption of preferred stock	0	(575)
Contractholder fund deposits	67	66
Contractholder fund withdrawals	(16)	(16)
Dividends paid on common stock	(476)	(459)
Dividends paid on preferred stock	(59)	(53)
Treasury stock purchases	0	(307)
Shares reissued under equity incentive plans, net	93	10
Other	(6)	(4)
Net cash used in financing activities	(252)	(758)
Net decrease in cash	(123)	(37)
Cash at beginning of period	722	736
Cash at end of period	$ 599	$ 699