Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible Assets

The weighted average useful life, gross carrying amount, and accumulated amortization of our intangible assets were as follows (dollars in millions):

	As of December 31, 2024						As of December 31, 2023
	Weighted Average Remaining Useful Life (in Years)		Gross Carrying Amount		Accumulated Amortization		Weighted Average Remaining Useful Life (in Years)		Gross Carrying Amount		Accumulated Amortization
Customer relationships		6.6	$	546.0	$	362.4		7.4	$	546.0	$	326.9
Trademarks and trade names		6.0		41.3		33.0		6.5		41.3		30.9
Other		1.9		4.4		4.4		2.9		4.4		4.3
Total intangible assets (excluding goodwill)		6.6	$	591.7	$	399.8		7.3	$	591.7	$	362.1