Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of derivative financial instrument assets and liabilities measured at fair value on a recurring basis

		December 31,		September 30,
	Level	2019		2018
		(in millions)
Earnout liability (see Note 16)	3	$	—	$	8.0
Derivative liability (see Notes 14 and 17)	2	$	—	$	7.8
Long term receivable (included in other assets)	2	$	1.5	$	2.2