Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows From Operating Activities
Net Income (Loss)	$ 1,843	$ (487)	$ 2,968
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	112	127	118
Investment gains and losses, net	(1,108)	1,493	(2,353)
Interest credited	45	43	45
Deferred income tax expense	223	(355)	483
Changes in:
Premiums and reinsurance receivable	(264)	(340)	(240)
Deferred policy acquisition costs	(80)	(96)	(78)
Other assets	(30)	28	(11)
Loss and loss expense reserves	650	1,095	559
Life policy and investment contract reserves	99	78	76
Unearned premiums	430	418	311
Other liabilities	90	88	128
Current income tax receivable/payable	42	(40)	(25)
Net cash provided by operating activities	2,052	2,052	1,981
Cash Flows From Investing Activities
Sale, call or maturity of fixed maturities	1,136	1,113	1,461
Sale of equity securities	206	430	136
Purchase of fixed maturities	(2,554)	(1,901)	(2,388)
Purchase of equity securities	(220)	(466)	(313)
Changes in finance receivables	(15)	7	(2)
Investment in buildings and equipment	(18)	(15)	(15)
Change in other invested assets, net	(143)	(101)	64
Net cash used in investing activities	(1,608)	(933)	(1,057)
Cash Flows From Financing Activities
Payment of cash dividends to shareholders	(454)	(423)	(395)
Shares acquired - share repurchase authorization	(67)	(410)	(144)
Changes in note payable	(25)	(4)	0
Proceeds from stock options exercised	9	10	13
Contract holders' funds deposited	83	70	85
Contract holders' funds withdrawn	(218)	(144)	(146)
Other	(129)	(93)	(98)
Net cash used in financing activities	(801)	(994)	(685)
Net change in cash and cash equivalents	(357)	125	239
Cash and cash equivalents at beginning of year	1,264	1,139	900
Cash and cash equivalents at end of year	907	1,264	1,139
Supplemental Disclosures of Cash Flow Information
Interest paid	54	53	52
Income taxes paid	136	165	257
Noncash Activities
Equipment acquired under finance lease obligations	20	17	12
Share-based compensation	19	27	26
Other assets and other liabilities	$ 77	$ 115	$ 87