Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Goodwill balances by business segment at December 31, 2024 and 2023 were:

DOLLARS IN MILLIONS	2024		2023
Specialty Property & Casualty Insurance	$	1,043.0	$	1,043.0
Life Insurance	207.7		207.7
Total	$	1,250.7	$	1,250.7

Schedule of Definite-Life Intangible Assets

The gross carrying amount and accumulated amortization of definite and indefinite life intangible assets at December 31, 2024 and 2023 were:

	2024						2023
(Dollars in Millions)	Gross Carrying Amount		Accumulated Amortization		Net Amount		Gross Carrying Amount		Accumulated Amortization		Net Amount
Definite Life Intangible Assets:
Value of Business Acquired	$	237.5	$	225.4	$	12.1	$	237.5	$	223.7	$	13.8
Customer Relationships	43.8		42.3		1.5		43.8		42.1		1.7
Agent Relationships	81.6		43.9		37.7		81.6		38.2		43.4
Trade Names	—		—		—		—		—		—
Internal-Use Software	395.1		180.3		214.8		388.0		178.0		210.0
Total Definite Life Intangible Assets	758.0		491.9		266.1		750.9		482.0		268.9
Indefinite Life Intangible Assets:
Trade Names	5.2		—		5.2		5.2		—		5.2
Insurance Licenses	44.2		—		44.2		44.2		—		44.2
Total Indefinite Life Intangible Assets	49.4		—		49.4		49.4		—		49.4
Total Intangible Assets	$	807.4	$	491.9	$	315.5	$	800.3	$	482.0	$	318.3

Schedule of Indefinite-Life Intangible Assets

The gross carrying amount and accumulated amortization of definite and indefinite life intangible assets at December 31, 2024 and 2023 were:

	2024						2023
(Dollars in Millions)	Gross Carrying Amount		Accumulated Amortization		Net Amount		Gross Carrying Amount		Accumulated Amortization		Net Amount
Definite Life Intangible Assets:
Value of Business Acquired	$	237.5	$	225.4	$	12.1	$	237.5	$	223.7	$	13.8
Customer Relationships	43.8		42.3		1.5		43.8		42.1		1.7
Agent Relationships	81.6		43.9		37.7		81.6		38.2		43.4
Trade Names	—		—		—		—		—		—
Internal-Use Software	395.1		180.3		214.8		388.0		178.0		210.0
Total Definite Life Intangible Assets	758.0		491.9		266.1		750.9		482.0		268.9
Indefinite Life Intangible Assets:
Trade Names	5.2		—		5.2		5.2		—		5.2
Insurance Licenses	44.2		—		44.2		44.2		—		44.2
Total Indefinite Life Intangible Assets	49.4		—		49.4		49.4		—		49.4
Total Intangible Assets	$	807.4	$	491.9	$	315.5	$	800.3	$	482.0	$	318.3

Finite-Lived Intangible Assets Amortization Expense

In 2024, 2023 and 2022, the Company recognized the following amortization expense on definite life intangible assets:

DOLLARS IN MILLIONS	2024		2023		2022
Specialty Property & Casualty Insurance	$	16.6	$	17.9	$	21.6
Life Insurance	6.0		3.4		3.8
Total Segment Amortization Expense	22.6		21.3		25.4
Corporate and Other	21.8		26.1		26.7
Non-Core Operations	1.9		1.2		1.6
Total Amortization Expense	$	46.3	$	48.6	$	53.7

Schedule of Definite-Life Intangible Assets, Future Amortization Expense

The amount of amortization expense expected to be recorded in the next five years for definite life intangible assets is as follows:

DOLLARS IN MILLIONS	2025		2026		2027		2028		2029
Definite Life Intangible Assets:
Value of Business Acquired	$	1.6	$	1.5	$	1.5	$	1.4	$	1.3
Customer Relationships	0.4		0.4		0.3		0.2		0.2
Agent Relationships	8.6		8.6		4.9		4.9		4.9
Internal-Use Software	35.5		30.9		25.3		22.1		14.7
Total	$	46.1	$	41.4	$	32.0	$	28.6	$	21.1