Consolidated Statements Of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income		$ 5,313	$ 8,539	$ 3,533
Adjustments to reconcile net income to net cash flows from operating activities
Net Realized Gains Losses		965	(1,152)	498
Accretion (Amortization) of Discounts and Premiums, Investments		189	332	367
Amortization of purchased intangibles		285	287	290
Deferred income taxes		132	(74)	(333)
Equity in net income of subsidiaries and affiliates	[1]	(16)	(2,433)	(1,019)
Unpaid losses and loss expenses		4,222	5,791	4,664
Unearned premiums		1,477	1,857	846
Future policy benefits		464	239	236
Insurance and reinsurance balances payable		461	582	535
Accounts payable, accrued expenses, and other liabilities		223	536	(98)
Income taxes payable		(149)	48	46
Insurance and reinsurance balances receivable		(696)	(984)	(114)
Reinsurance recoverable		(1,776)	(1,953)	(336)
Deferred policy acquisition costs		(328)	(247)	(89)
Other		477	(219)	759
Net Cash Provided by (Used in) Operating Activities, Total		11,243	11,149	9,785
Cash flows from investing activities
Purchases of fixed maturities available for sale		(27,844)	(30,222)	(26,298)
Purchases of fixed maturities held to maturity		(618)	(594)	(202)
Purchases of equity securities		(895)	(1,167)	(6,419)
Sales of fixed maturities available for sale		16,855	6,596	11,377
Sales of equity securities		4,615	1,018	3,880
Maturities and redemptions of fixed maturities available for sale		9,415	17,361	12,450
Maturities and redemptions of fixed maturities held to maturity		1,712	1,964	995
Net change in short-term investments		(1,452)	1,175	(81)
Net derivative instruments settlements		(84)	(219)	(113)
Private equity contributions		(2,649)	(2,471)	(1,924)
Private equity distributions		1,017	1,421	907
Acquisition of subsidiaries (net of cash acquired of $366, nil, and nil)		(4,982)	0	0
Payment, including deposit, for Huatai Group Interest		(184)	(1,184)	(1,623)
Other		(560)	(337)	(470)
Net Cash Provided by (Used in) Investing Activities		(5,654)	(6,659)	(7,521)
Cash flows from financing activities
Dividends paid on Common Shares		(1,375)	(1,401)	(1,388)
Common Shares repurchased		(2,894)	(4,861)	(523)
Proceeds from issuance of long-term debt		0	1,576	988
Proceeds from issuance of repurchase agreements		4,510	1,858	2,354
Repayments of Long-term Debt		(1,000)	0	(1,301)
Repayment of repurchase agreements		(4,508)	(1,858)	(2,354)
Proceeds from share-based compensation plans		264	300	145
Policyholder contract deposits		496	512	470
Policyholder contract withdrawals		(519)	(454)	(386)
Tax withholding payments for share-based compensation plans		(101)	(81)	(87)
Net cash flows (used for) from financing activities		(5,127)	(4,409)	(2,082)
Effect of foreign currency rate changes on cash and restricted cash		(146)	(106)	8
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		316	(25)	190
Cash and restricted cash - beginning of year		1,811	1,836	1,646
Cash and restricted cash - end of year		2,127	1,811	1,836
Supplemental cash flow information
Taxes paid		1,242	1,298	902
Interest paid		$ 552	$ 492	$ 524

[1] Equity in net income (loss) of partially-owned entities includes mark-to-market gain (loss) on private equities where we own more than three percent, totaling $(219) million, $2,004 million, and $747 million for the years ended December 31, 2022, 2021, and 2020, respectively. This line item also includes net income of $5 million, $233 million, and $167 million attributable to our investments in Huatai for the years ended December 31, 2022, 2021, and 2020, respectively.