Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets

	December 31, 2019			September 30, 2018
	(in millions)
Trademarks	$	21.6		$	17.6
Customer relationships		20.1			15.1
		41.7			32.7
Less: accumulated amortization		(31.8	)		(27.0	)
	$	9.9		$	5.7

Schedule of estimated intangible asset amortization expense

Year ending December 31, (in millions)
2020	$	2.4
2021		0.8
2022		0.8
2023		0.8
2024		0.8
Thereafter		4.3
Total	$	9.9

Schedule of goodwill

	December 31, 2019		September 30, 2018
	(in millions)
Balance at beginning of period	$	44.9	$	47.1
Foreign currency translation adjustments		3.9		(1.3	)
Acquisition of NTG		32.1		—
Ending balance	$	80.9	$	45.8