Retirement and Postretirement Plans (Tables)

3 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Schedule of Components of Net Pension Expense

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

	Three Months Ended December 31				Consolidated Statements of Income Item
	2020		2019
Service cost	$	0.5	$	0.4	Cost of goods sold
Service cost	0.8		0.8		Selling and administrative expenses
Interest cost	1.9		2.5		Investment income (expense) and other, net
Expected return on plan assets	(3.0)		(3.7)		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	1.5		1.5		Investment income (expense) and other, net
Net periodic benefit cost	1.7		1.6
Special termination benefits1	3.3		—		Special charges
Net pension expense	$	5.0	$	1.6
1 In September 2020, we offered certain employees in the United States the option to participate in a voluntary early retirement plan. The employees who accepted the offer received special termination benefits during the three months ended December 31, 2020, which were recorded as a component of Special charges in the Consolidated Statements of Income. See Note 8. Special Charges for further information.