Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Goodwill balances by business segment at December 31, 2022 and 2021 were:

DOLLARS IN MILLIONS	2022		2021
Specialty Property & Casualty Insurance	$	1,043.0	$	1,043.0
Preferred Property & Casualty Insurance	49.6		49.6
Life & Health Insurance	207.7		219.4
Total	$	1,300.3	$	1,312.0

Schedule of Definite-Life Intangible Assets

The gross carrying amount and accumulated amortization of Definite and Indefinite life intangible assets at December 31, 2022 and 2021 were:

	2022						2021
(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	$	222.1	$	15.4	$	237.5	$	218.5	$	19.0
Customer Relationships	43.8		41.1		2.7		43.8		38.1		5.7
Agent Relationships	81.6		31.0		50.6		81.6		23.6		58.0
Trade Names	1.8		1.7		0.1		1.8		0.9		0.9
Internal-Use Software	352.1		153.9		198.2		341.7		132.4		209.3
Total Definite Life Intangible Assets	716.8		449.8		267.0		706.4		413.5		292.9
Indefinite Life Intangible Assets:
Trade Names	5.2		—		5.2		5.2		—		5.2
Insurance Licenses	44.5		—		44.5		45.1		—		45.1
Total Indefinite Life Intangible Assets	49.7		—		49.7		50.3		—		50.3
Total Intangible Assets	$	766.5	$	449.8	$	316.7	$	756.7	$	413.5	$	343.2

Schedule of Indefinite-Life Intangible Assets

The gross carrying amount and accumulated amortization of Definite and Indefinite life intangible assets at December 31, 2022 and 2021 were:

	2022						2021
(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	$	222.1	$	15.4	$	237.5	$	218.5	$	19.0
Customer Relationships	43.8		41.1		2.7		43.8		38.1		5.7
Agent Relationships	81.6		31.0		50.6		81.6		23.6		58.0
Trade Names	1.8		1.7		0.1		1.8		0.9		0.9
Internal-Use Software	352.1		153.9		198.2		341.7		132.4		209.3
Total Definite Life Intangible Assets	716.8		449.8		267.0		706.4		413.5		292.9
Indefinite Life Intangible Assets:
Trade Names	5.2		—		5.2		5.2		—		5.2
Insurance Licenses	44.5		—		44.5		45.1		—		45.1
Total Indefinite Life Intangible Assets	49.7		—		49.7		50.3		—		50.3
Total Intangible Assets	$	766.5	$	449.8	$	316.7	$	756.7	$	413.5	$	343.2

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	2023		2024		2025		2026		2027
Definite Life Intangible Assets:
Value of Business Acquired	$	1.8	$	1.6	$	1.6	$	1.5	$	1.5
Customer Relationships	1.1		0.4		0.4		0.3		0.2
Agent Relationships	7.3		5.5		4.9		4.9		1.2
Internal-Use Software	37.2		30.3		23.8		20.2		15.3
Total	$	47.4	$	37.8	$	30.7	$	26.9	$	18.2