Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net Earnings Including Redeemable Noncontrolling Interest	$ 39.3	$ 32.9
Adjustments to reconcile net earnings including redeemable noncontrolling interest to net cash (used in) provided by operating activities:
Depreciation and amortization	5.3	6.7
Unrealized gain on interest rate swaps	(1.7)	(0.7)
Non-cash stock-based compensation expense	1.5	1.1
Deferred income taxes	0.9	0.7
Other, net	1.2	0.8
Other changes in operating assets and liabilities:
Increase in receivables	(14.4)	(39.9)
(Increase) decrease in inventories	(12.4)	14.5
Increase in prepaid expenses and other current assets	(4.8)	(6.1)
Decrease in other assets	0.5	0.7
(Decrease) increase in accounts payable and other current liabilities	(24.5)	12.3
Increase in non-current liabilities	0.0	0.3
Net Cash (Used in) Provided by Operating Activities	(9.1)	23.3
Cash Flows from Investing Activities:
Additions to property	(0.6)	0.0
Net Cash Used in Investing Activities	(0.6)	0.0
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt	0.0	20.0
Repayments of long-term debt	(90.1)	(37.5)
Purchases of treasury stock	(18.1)	0.0
Distributions to Post Holdings, Inc.	(3.2)	(3.6)
Other, net	(1.1)	(0.9)
Net Cash Used in Financing Activities	(112.5)	(22.0)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0.0	0.8
Net (Decrease) Increase in Cash and Cash Equivalents	(122.2)	2.1
Cash and Cash Equivalents, Beginning of Year	152.6	48.7
Cash and Cash Equivalents, End of Period	$ 30.4	$ 50.8