Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Jun. 30, 2020

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component

Changes in accumulated other comprehensive income (loss) by component were as follows (in millions):

	Three Months Ended June 30, 2020
	Employee Pension and Postretirement Benefits, Net of Tax			Cumulative Translation Adjustments			Derivative Instruments, Net of Tax			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$	(68.0	)	$	(141.4	)	$	0.5		$	(208.9	)
Other comprehensive income (loss) before reclassifications		—			14.4			(0.7	)		13.7
Amounts reclassified from accumulated other comprehensive income (loss)		0.7			—			—			0.7
Net current period other comprehensive income (loss)		0.7			14.4			(0.7	)		14.4
Balance at end of period	$	(67.3	)	$	(127.0	)	$	(0.2	)	$	(194.5	)

	Three Months Ended June 30, 2019
	Employee Pension and Postretirement Benefits, Net of Tax			Cumulative Translation Adjustments			Derivative Instruments, Net of Tax		Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$	(23.8	)	$	(111.9	)	$	0.1	$	(135.6	)
Other comprehensive income (loss) before reclassifications		—			4.2			—		4.2
Amounts reclassified from accumulated other comprehensive income (loss)		—			—			—		—
Net current period other comprehensive income (loss)		—			4.2			—		4.2
Balance at end of period	$	(23.8	)	$	(107.7	)	$	0.1	$	(131.4	)

	Nine Months Ended June 30, 2020
	Employee Pension and Postretirement Benefits, Net of Tax			Cumulative Translation Adjustments			Derivative Instruments, Net of Tax			Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$	(69.4	)	$	(132.5	)	$	0.3		$	(201.6	)
Other comprehensive income (loss) before reclassifications		—			5.5			(0.5	)		5.0
Amounts reclassified from accumulated other comprehensive income (loss)		2.1			—			—			2.1
Net current period other comprehensive income (loss)		2.1			5.5			(0.5	)		7.1
Balance at end of period	$	(67.3	)	$	(127.0	)	$	(0.2	)	$	(194.5	)

	Nine Months Ended June 30, 2019
	Employee Pension and Postretirement Benefits, Net of Tax			Cumulative Translation Adjustments			Derivative Instruments, Net of Tax			Accumulated Other Comprehensive Income (Loss)
Balance at September 30, 2018	$	(10.9	)	$	(96.2	)	$	0.3		$	(106.8	)
Tax impact of U.S. tax reform on Accumulated Other Comprehensive Income (ASU 2018-02)		(9.1	)		—			—			(9.1	)
Balance at beginning of period		(20.0	)		(96.2	)		0.3			(115.9	)
Other comprehensive income (loss) before reclassifications		(3.9	)		(11.5	)		(0.2	)		(15.6	)
Amounts reclassified from accumulated other comprehensive income (loss)		0.1			—			—			0.1
Net current period other comprehensive income (loss)		(3.8	)		(11.5	)		(0.2	)		(15.5	)
Balance at end of period	$	(23.8	)	$	(107.7	)	$	0.1		$	(131.4	)

Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) on Condensed Consolidated Statements of Income

The effects of the reclassifications out of Accumulated other comprehensive income (loss) on the Condensed Consolidated Statements of Income were as follows (in millions):

	Classification of income (expense)	Three Months Ended June 30,						Nine Months Ended June 30,
		2020			2019			2020			2019
Amortization of employee pension and postretirement benefits items
Prior service costs	Miscellaneous, net	$	0.2		$	—		$	0.5		$	0.2
Actuarial (gains) losses	Miscellaneous, net		0.9			(0.1	)		2.4			(0.1	)
Total before tax			1.1			(0.1	)		2.9			0.1
Tax provision (benefit)			(0.4	)		0.1			(0.8	)		—
Net of tax		$	0.7		$	—		$	2.1		$	0.1