Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 2,294	$ 1,892
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses	101	77
Market risk benefits (gains) losses	(21)	115
Amortization of premiums/discounts on fixed maturities	(80)	(14)
Amortization of purchased intangibles	80	72
Equity in net income of partially-owned entities	(184)	(340)
Deferred income taxes	(24)	9
Unpaid losses and loss expenses	175	(14)
Unearned premiums	633	591
Future policy benefits	445	136
Insurance and reinsurance balances payable	155	(9)
Accounts payable, accrued expenses, and other liabilities	(267)	(390)
Income taxes	257	128
Insurance and reinsurance balances receivable	(586)	(402)
Reinsurance recoverable	852	622
Deferred policy acquisition costs	(390)	(254)
Net purchases of investments by consolidated investment products	(404)	0
Other	184	32
Net cash flows from operating activities	3,220	2,251
Cash flows from investing activities
Purchases of fixed maturities available-for-sale	(8,617)	(7,169)
Purchases of fixed maturities held-to-maturity	0	(88)
Purchases of equity securities	(752)	(135)
Sales of fixed maturities available-for-sale	4,368	3,854
Sales of equity securities	520	43
Maturities and redemptions of fixed maturities available-for-sale	2,149	1,541
Maturities and redemptions of fixed maturities held-to-maturity	0	472
Net change in short-term investments	(708)	1,256
Net derivative instruments settlements	(17)	(38)
Private equity contributions	(248)	(384)
Private equity distributions	177	273
Acquisition of subsidiaries	(236)	(23)
Other	(382)	(172)
Net cash flows used for investing activities	(3,746)	(570)
Cash flows from financing activities
Proceeds from issuance of long-term debt	996	0
Dividends paid on Common Shares	(349)	(345)
Common Shares repurchased	(404)	(545)
Proceeds from issuance of repurchase agreements	1,062	1,308
Repayment of long-term debt	0	475
Repayment of repurchase agreements	(984)	(1,307)
Proceeds from share-based compensation plans	163	55
Policyholder contract deposits	336	95
Policyholder contract withdrawals	(245)	(101)
Third-party capital invested into consolidated investment products	509	0
Third-party capital distributed by consolidated investment products	(413)	0
Other	(109)	(109)
Net cash flows from (used for) financing activities	562	(1,424)
Effect of foreign currency rate changes on cash and restricted cash	(6)	(2)
Net increase in cash and restricted cash	30	255
Cash and restricted cash - beginning of period	2,621	2,127
Cash and restricted cash - end of period	2,651	2,382
Supplemental cash flow information
Taxes paid	89	219
Interest paid	$ 112	$ 99