Retirement and Postretirement Plans (Tables)

6 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Schedule of Components of Net Pension Expense

The following table details the components of net pension expense for our defined benefit retirement plans.

	Three Months Ended March 31				Six Months Ended March 31				Condensed Consolidated Statements of Income Item
	2020		2019		2020		2019
Service cost	$	0.4	$	0.4	$	0.8	$	0.7	Cost of goods sold
Service cost	0.8		0.7		1.6		1.5		Selling and administrative expenses
Interest cost	2.4		3.2		4.9		6.3		Investment income (expense) and other, net
Expected return on plan assets	(3.7)		(3.7)		(7.4)		(7.4)		Investment income (expense) and other, net
Amortization of unrecognized prior service cost, net	—		—		0.1		—		Investment income (expense) and other, net
Amortization of net loss	1.6		0.6		3.1		1.2		Investment income (expense) and other, net
Settlement charge	8.5		—		8.5		—		Investment income (expense) and other, net
Net pension expense	$	10.0	$	1.2	$	11.6	$	2.3