Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities
Net income	$ 2,347	$ 1,343
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	407	116
Market risk benefits (gains) losses	(14)	92
Amortization of premiums (discounts) on fixed maturities	(102)	(100)
Amortization of purchased intangibles	73	75
Equity in net income (loss) of partially-owned entities	(157)	(82)
Deferred income taxes	156	(198)
Unpaid losses and loss expenses	646	1,182
Unearned premiums	747	868
Future policy benefits	1,023	440
Insurance and reinsurance balances payable	77	305
Accounts payable, accrued expenses, and other liabilities	(592)	(567)
Income taxes	217	203
Insurance and reinsurance balances receivable	(1,076)	(874)
Reinsurance recoverable	244	(127)
Deferred policy acquisition costs	(419)	(428)
Net sales (purchases) of investments by consolidated investment products	144	(435)
Other	226	(247)
Net cash flows from operating activities	3,947	1,566
Cash flows from investing activities
Purchases of fixed maturities available-for-sale	(9,119)	(5,894)
Purchases of equity securities	(993)	(783)
Sales of fixed maturities available-for-sale	3,069	2,660
Sales of equity securities	878	637
Maturities and redemptions of fixed maturities available-for-sale	3,750	2,902
Net change in short-term investments	(133)	773
Net derivative instruments settlements	19	(21)
Private equity contributions	(161)	(879)
Private equity distributions	241	222
Other	(386)	(415)
Net cash flows used for investing activities	(2,835)	(798)
Cash flows from financing activities
Dividends paid on Common Shares	(380)	(366)
Common Shares repurchased	(1,174)	(691)
Proceeds from issuance of long-term debt	254	0
Repayment of long-term debt	0	(800)
Proceeds from share-based compensation plans	118	98
Policyholder contract deposits	382	242
Policyholder contract withdrawals	(271)	(176)
Third-party capital invested into consolidated investment products	494	559
Third-party capital distributed by consolidated investment products	(499)	(242)
Proceeds from issuance of repurchase agreements	(2,164)	(810)
Repayment of repurchase agreements	(1,917)	(447)
Other	(121)	(112)
Net cash flows used for financing activities	(950)	(1,125)
Effect of foreign currency rate changes on cash and restricted cash	2	58
Net increase (decrease) in cash and restricted cash	164	(299)
Cash and restricted cash - beginning of period	2,470	2,549
Cash and restricted cash - end of period	2,634	2,250
Supplemental cash flow information
Interest paid	$ 189	$ 146