Accumulated Other Comprehensive Loss (Income) (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of accumulated other comprehensive (loss) income

	Foreign Currency Translation Adjustments			Change in Fair Value of Hedging Instrument			Unrecognized Pension Benefit Costs			Accumulated Other Comprehensive (Income)
	(in millions)
Balance at October 1, 2017	$	(78.6	)	$	—		$	25.5		$	(53.1	)
Change during the period		(0.3	)		0.1			(5.2	)		(5.4	)
Balance at September 30, 2018		(78.9	)		0.1			20.3			(58.5	)
Change during the period		—			(0.2	)		2.8			2.6
Balance at December 31, 2018		(78.9	)		(0.1	)		23.1			(55.9	)
Change during the period		2.4			1.5			6.9			10.8
Balance at December 31, 2019	$	(76.5	)	$	1.4		$	30.0		$	(45.1	)