Consolidated Statements Of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income		$ 8,539	$ 3,533	$ 4,454
Adjustments to reconcile net income to net cash flows from operating activities
Net Realized Gains Losses		(1,152)	498	530
Accretion (Amortization) of Discounts and Premiums, Investments		332	367	395
Amortization of purchased intangibles		287	290	305
Deferred income taxes		(74)	(333)	(97)
Unpaid losses and loss expenses		5,791	4,664	(257)
Unearned premiums		1,857	846	1,051
Future policy benefits		239	236	215
Insurance and reinsurance balances payable		582	535	(302)
Accounts payable, accrued expenses, and other liabilities		536	(98)	(207)
Income taxes payable		48	46	(7)
Insurance and reinsurance balances receivable		(984)	(114)	(270)
Reinsurance recoverable		(1,953)	(336)	838
Deferred policy acquisition costs		(247)	(89)	(344)
Equity in net income of subsidiaries and affiliates	[1]	(2,433)	(1,019)	(617)
Other		(219)	759	655
Net Cash Provided by (Used in) Operating Activities, Total		11,149	9,785	6,342
Cash flows from investing activities
Purchases of fixed maturities available for sale		(30,222)	(26,298)	(25,846)
Purchases of fixed maturities held to maturity		(594)	(202)	(229)
Purchases of equity securities		(1,167)	(6,419)	(531)
Sales of fixed maturities available for sale		6,596	11,377	13,110
Sales of to be announced mortgage-backed securities		0	0	6
Sales of equity securities		1,018	3,880	611
Maturities and redemptions of fixed maturities available for sale		17,361	12,450	9,039
Maturities and redemptions of fixed maturities held to maturity		1,964	995	946
Net change in short-term investments		1,175	(81)	(1,117)
Net derivative instruments settlements		(219)	(113)	(703)
Private equity contributions		(2,471)	(1,924)	(1,315)
Private equity distributions		1,421	907	1,390
Acquisition of subsidiaries (net of cash acquired of nil, $45, and nil)		0	0	(29)
Payment, including deposit, for Huatai Group Interest		(1,184)	(1,623)	(580)
Other		(337)	(470)	(657)
Net Cash Provided by (Used in) Investing Activities		(6,659)	(7,521)	(5,905)
Cash flows from financing activities
Dividends paid on Common Shares		(1,401)	(1,388)	(1,354)
Common Shares repurchased		(4,861)	(523)	(1,530)
Proceeds from issuance of long-term debt		1,576	988	2,828
Proceeds from issuance of repurchase agreements		1,858	2,354	2,817
Repayments of Long-term Debt		0	(1,301)	(510)
Repayment of repurchase agreements		(1,858)	(2,354)	(2,817)
Proceeds from share-based compensation plans		300	145	204
Policyholder contract deposits		512	470	514
Policyholder contract withdrawals		(454)	(386)	(303)
Other		(81)	(87)	0
Net cash flows (used for) from financing activities		(4,409)	(2,082)	(151)
Effect of foreign currency rate changes on cash and restricted cash		(106)	8	20
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(25)	190	306
Cash and restricted cash - beginning of year		1,836	1,646	1,340
Cash and restricted cash - end of year		1,811	1,836	1,646
Supplemental cash flow information
Taxes paid		1,298	902	912
Interest paid		$ 492	$ 524	$ 512

[1] Equity in net income of partially-owned entities includes $233 million, $167 million, and $74 million attributable to our investments in Huatai (Huatai Group, Huatai P&C, and Huatai Life) for the years ended December 31, 2021, 2020, and 2019, respectively.