Employee Benefit Plans

6 Months Ended

Mar. 31, 2020

Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]

5.	Employee Benefit Plans

Components of net periodic pension benefit cost were as follows (in millions):

	Three Months Ended March 31,						Six Months Ended March 31,
	2020			2019			2020			2019
Components of net periodic benefit cost
Service cost	$	2.6		$	2.4		$	5.1		$	4.8
Interest cost		4.3			4.7			8.6			9.4
Expected return on plan assets		(5.2	)		(5.0	)		(10.3	)		(10.0	)
Amortization of prior service cost (benefit)		0.4			0.5			0.8			0.9
Curtailment		—			1.2			—			1.2
Amortization of net actuarial loss (gain)		0.8			0.1			1.6			0.1
Expenses paid		1.0			0.6			2.0			1.2
Net periodic benefit cost	$	3.9		$	4.5		$	7.8		$	7.6

Components of net periodic other post-employment benefit cost were as follows (in millions):

	Three Months Ended March 31,						Six Months Ended March 31,
	2020			2019			2020			2019
Components of net periodic benefit cost
Service cost	$	0.8		$	0.7		$	1.7		$	1.5
Interest cost		0.4			0.5			0.8			1.0
Amortization of prior service cost (benefit)		(0.3	)		(0.3	)		(0.5	)		(0.7	)
Amortization of net actuarial loss (gain)		—			—			(0.1	)		(0.1	)
Net periodic benefit cost	$	0.9		$	0.9		$	1.9		$	1.7

Components of net periodic benefit cost other than “Service cost” and “Expenses paid” are included in “Miscellaneous, net” in the Condensed Consolidated Statements of Income. Administrative expense for the three and six months ended March 31, 2019, which was previously included in “Service cost”, is now reported in “Expenses paid” to improve the comparability between the periods.