Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Cash Flows from Operating Activities:
Net earnings including redeemable noncontrolling interest	$ 114.4	$ 100.1	$ 123.1
Adjustments to reconcile net earnings including redeemable noncontrolling interest to net cash provided by operating activities:
Depreciation and amortization	53.7	25.3	25.3
Unrealized (gain) loss on interest rate swaps	(2.3)	1.0	0.0
Loss on refinancing of debt	1.6	0.0	0.0
Non-cash stock-based compensation expense	4.6	2.5	0.0
Deferred income taxes	(1.5)	(3.3)	0.5
Other, net	5.3	4.9	12.6
Other changes in operating assets and liabilities:
(Increase) decrease in receivables	(21.0)	(14.2)	18.5
Decrease (increase) in inventories	32.4	(11.5)	(77.2)
Increase in prepaid expenses and other current assets	(5.7)	(0.2)	(3.6)
Decrease in other assets	2.5	2.6	0.0
Increase (decrease) in accounts payable and other current liabilities	42.1	(12.1)	(1.9)
Increase in non-current liabilities	0.0	2.1	1.0
Net Cash Provided by Operating Activities	226.1	97.2	98.3
Cash Flows from Investing Activities:
Additions to property	(1.6)	(2.1)	(3.2)
Net Cash Used in Investing Activities	(1.6)	(2.1)	(3.2)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt	20.0	881.0	0.0
Proceeds from issuance of common stock, net of issuance costs	0.0	524.4	0.0
Repayments of long-term debt	(113.8)	(1,416.3)	0.0
Payments of debt issuance costs and deferred financing fees	0.0	(9.6)	0.0
Payment of debt refinancing fees	(1.6)	0.0	0.0
Distributions to Post Holdings, Inc., net	(24.6)	(32.1)	(100.2)
Other, net	(0.9)	0.0	0.0
Net Cash Used in Financing Activities	(120.9)	(52.6)	(100.2)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0.3	0.7	(0.3)
Net Increase (Decrease) in Cash and Cash Equivalents	103.9	43.2	(5.4)
Cash and Cash Equivalents, Beginning of Year	48.7	5.5	10.9
Cash and Cash Equivalents, End of Year	$ 152.6	$ 48.7	$ 5.5