CONSOLIDATED BALANCE SHEETS - USD ($)	Jun. 30, 2023	Dec. 31, 2022
ASSETS:
Fixed maturities - available for sale, at fair value (amortized cost: 2023, $15,141; 2022, $13,699, credit allowances: 2023, $(57); 2022, $(46))	$ 14,202,000,000	$ 12,671,000,000
Fixed maturities - held to maturity, at amortized cost (fair value: 2023, $771; 2022, $793, net of credit allowances: 2023, $(8); 2022, $(9))	788,000,000	811,000,000
Equity securities, at fair value	167,000,000	194,000,000
Other invested assets	2,853,000,000	2,754,000,000
Other invested assets, at fair value	1,474,000,000	1,472,000,000
Short-term investments	1,095,000,000	812,000,000
Cash	478,000,000	481,000,000
Total investments and cash	21,056,000,000	19,195,000,000
Accrued investment income	187,000,000	150,000,000
Premiums receivable (net of credit allowances:2023, $(22); 2022, $(21))	2,084,000,000	1,721,000,000
Income tax asset, net	201,000,000	288,000,000
Funds held by reinsureds	295,000,000	303,000,000
Deferred acquisition costs	530,000,000	499,000,000
Prepaid reinsurance premiums	522,000,000	463,000,000
Other assets (net of credit allowances: 2023, $(7); 2022, $(5))	830,000,000	722,000,000
TOTAL ASSETS	29,494,000,000	27,957,000,000
LIABILITIES:
Reserve for losses and loss adjustment expenses	15,512,000,000	14,977,000,000
Unearned premium reserve	3,497,000,000	3,177,000,000
Funds held under reinsurance treaties	55,000,000	43,000,000
Amounts due to reinsurers	509,000,000	436,000,000
Losses in course of payment	72,000,000	77,000,000
Senior notes	2,348,000,000	2,347,000,000
Long-term notes	218,000,000	218,000,000
Borrowings from FHLB	519,000,000	519,000,000
Accrued interest on debt and borrowings	19,000,000	19,000,000
Unsettled securities payable	10,000,000	1,000,000
Other liabilities	446,000,000	489,000,000
Total liabilities	23,204,000,000	22,303,000,000
Commitments and Contingencies (Note 11)
STOCKHOLDER'S EQUITY:
Common stock, par value: $0.01; 3,000 shares authorized; 1,000 shares issued and outstanding (2023 and 2022)	0	0
Additional paid-in capital	1,102,000,000	1,102,000,000
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $(202) at 2023 and $(225) at 2022	(762,000,000)	(848,000,000)
Retained earnings	5,950,000,000	5,400,000,000
Total stockholder's equity	6,290,000,000	5,654,000,000
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	29,494,000,000	27,957,000,000
Affiliated Entity
ASSETS:
Notes receivable - affiliated	0	840,000,000
Reinsurance recoverables - affiliated	1,830,000,000	1,935,000,000
Nonrelated Party
ASSETS:
Reinsurance recoverables - affiliated	$ 1,960,000,000	$ 1,841,000,000