Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The Company’s long-term debt consists of the following as of December 31, 2022 and 2021 (dollars in millions):

	2022		2021
$400 million 4.70% Senior Notes due 2023	$	400	$	400
$400 million 3.95% Senior Notes due 2026	400		400
$600 million 3.90% Senior Notes due 2029	599		599
$600 million 3.15% Senior Notes due 2030	598		597
$100 million 4.09% Promissory Note due 2039	77		80
$400 million 6.20% Subordinated Debentures due 2042	—		400
$500 million 4.00% Surplus Notes due 2051	500		500
$700 million 7.125% Subordinated Debentures due 2052	700		—
$400 million 5.75% Subordinated Debentures due 2056	400		400
$400 million Variable Rate Junior Subordinated Debentures due 2065	319		319
Sub-total	3,993		3,695
Unamortized issuance costs	(32)		(28)
Long-term Debt	$	3,961	$	3,667

Schedule of Maturities of Long-term Debt [Table Text Block]

Future principal payments due on long-term debt, excluding discounts, as of December 31, 2022, were as follows (dollars in millions):

	Calendar Year
	2023		2024		2025		2026		2027		Thereafter
Long-term debt	$	403	$	3	$	4	$	404	$	4	$	3,179

Schedule of Line of Credit Facilities [Table Text Block]

The following table provides additional information on the Company’s existing committed credit facilities as of December 31, 2022 and 2021 (dollars in millions):

				Amount Utilized(1) December 31,
Current Capacity			Maturity Date	2022		2021		Basis of Fees
$	850		August 2023	$	1	$	21	Senior unsecured long-term debt rating
500			November 2023	346		376		Debt rating and utilization %
3		(2)	December 2023	3		80		Fixed
100			February 2024	97		51		Fixed
125			March 2024	103		108		Fixed
100			August 2024	30		40		Fixed
100			May 2025	70		70		Fixed

(1)Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.

(2)Foreign currency denominated facility, amounts presented are in U.S. dollars.