Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Intangible Assets

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

	March 31, 2019						December 31, 2018
	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		10.6	$	504.6	$	153.4		10.9	$	504.6	$	144.5
Trademarks and trade names	9.8			34.8		18.7		10.1		34.8		18.3
Other		2.7		4.3		2.9		3.0		4.3		2.7
Total intangible assets (excluding goodwill)		10.6	$	543.7	$	175.0		10.8	$	543.7	$	165.5