Derivative Financial Instruments and Hedging Activities (Tables)

12 Months Ended

Sep. 30, 2020

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Schedule of Fair Values of All Open Derivative Instruments

The fair values of all open derivative instruments were as follows (in millions):

	September 30, 2020				September 30, 2019
	Other         Current        Assets		Other         Current        Liabilities		Other         Current        Assets		Other         Current        Liabilities
Cash flow hedges:
Foreign exchange contracts	$	—	$	0.5	$	0.4	$	—
Not designated as hedging instruments:
Foreign exchange contracts		—		2.0		0.4		0.4
	$	—	$	2.5	$	0.8	$	0.4

Schedule of Pre-tax Effects of Derivative Instruments

The pre-tax effects of derivative instruments consisted of the following (in millions):

		Fiscal Year Ended September 30,
	Classification of Gains (Losses)	2020		2019			2018
Cash flow hedges:
Foreign exchange contracts	Cost of sales	$	0.6	$	1.3		$	(0.5	)
			—
Not designated as hedging instruments:
Foreign exchange contracts	Miscellaneous, net		1.7		(1.7	)		(2.4	)
Interest rate contracts	Miscellaneous, net		—		—			(0.7	)
		$	2.3	$	(0.4	)	$	(3.6	)