Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets

Other intangible assets, which are included in Other assets on the accompanying consolidated balance sheets as of December 31, 2017 and 2016 were as follows:

	December 31, 2017					December 31, 2016
(in millions)	Gross carrying amount		Accumulated amortization			Gross carrying amount		Accumulated amortization
Technology	$	91.4	$	(27.4	)	$	91.4	$	(23.0	)
Customer relationships	35.7		(9.1		)	35.7		(7.6		)
Trademarks	64.6		(17.2		)	64.6		(12.9		)
Total amortizable intangible assets	$	191.7	$	(53.7	)	$	191.7	$	(43.5	)