Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Schedule of Unrealized Loss on Investments [Table Text Block]

The estimated fair value and gross unrealized losses of fixed maturity securities in an unrealized loss position, by sector and by length of time that the securities have been in a continuous unrealized loss position, were as follows at:


	December 31, 2024								December 31, 2023
	Less than 12 Months				12 Months or Greater				Less than 12 Months				12 Months or Greater
	Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
	(Dollars in millions)
U.S. corporate	$	10,758	$	719	$	17,329	$	3,146	$	4,549	$	409	$	22,435	$	2,923
Foreign corporate	3,269		351		5,502		1,117		1,010		74		8,229		1,202
RMBS	1,227		82		4,624		785		413		21		5,749		784
U.S. government and agency	2,384		116		1,858		575		445		8		3,453		509
CMBS	1,326		90		4,338		325		411		33		5,713		568
ABS	717		10		1,076		65		572		3		3,355		128
State and political subdivision	871		63		1,435		304		460		31		1,636		267
Foreign government	273		29		433		71		113		6		620		81
Total fixed maturity securities	$	20,825	$	1,460	$	36,595	$	6,388	$	7,973	$	585	$	51,190	$	6,462
Total number of securities in an unrealized loss position	3,356				5,195				1,339				6,958