Pension and Other Postretirement Benefits

3 Months Ended

Dec. 31, 2022

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Pension and Other Postretirement benefits

PENSION AND OTHER POSTRETIREMENT BENEFITSThe Company maintains qualified defined benefit plans in the U.S., the U.K. and Canada for certain employees primarily within its Post Consumer Brands and Weetabix segments. Certain of the Company’s employees are eligible to participate in the Company’s postretirement benefit plans (partially subsidized retiree health and life insurance). Amounts for the Canadian plans are included in the North America disclosures and are not disclosed separately because they do not constitute a significant portion of the combined amounts.

The following tables present the components of net periodic benefit cost (income) for the pension plans. Service cost was reported in “Cost of goods sold” and “Selling, general and administrative expenses” and all other components of net periodic benefit cost (income) were reported in “Other income, net” in the Condensed Consolidated Statements of Operations.

	North America
	Three Months Ended December 31,
	2022		2021
Service cost	$	0.6	$	1.1
Interest cost	1.3		0.9
Expected return on plan assets	(1.9)		(1.8)
Recognized net actuarial loss	—		0.4
Net periodic benefit cost	$	—	$	0.6

	Other International
	Three Months Ended December 31,
	2022		2021
Interest cost	$	5.6	$	4.2
Expected return on plan assets	(7.4)		(6.6)
Recognized prior service cost	0.1		0.1
Net periodic benefit income	$	(1.7)	$	(2.3)

The following table presents the components of net periodic benefit income for the North American other postretirement benefit plans. Service cost was reported in “Cost of goods sold” and “Selling, general and administrative expenses” and all other components of net periodic benefit income were reported in “Other income, net” in the Condensed Consolidated Statements of Operations.

	Three Months Ended December 31,
	2022		2021
Service cost	$	0.1	$	0.1
Interest cost	0.6		0.4
Recognized net actuarial loss	(0.1)		0.2
Recognized prior service credit	(1.2)		(1.2)
Net periodic benefit income	$	(0.6)	$	(0.5)