Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net Sales	$ 1,566.3	$ 1,337.5
Cost of goods sold	1,151.4	1,005.8
Gross Profit	414.9	331.7
Selling, general and administrative expenses	228.7	220.5
Amortization of intangible assets	36.4	36.5
Other operating income, net	(0.1)	(3.5)
Operating Profit	149.9	78.2
Interest expense, net	65.9	82.8
Gain on extinguishment of debt, net	(8.7)	0.0
(Income) expense on swaps, net	(12.3)	36.9
Gain on investment in BellRing	(5.1)	0.0
Other income, net	(8.3)	(2.9)
Earnings (Loss) before Income Taxes and Equity Method Loss	118.4	(38.6)
Income tax expense (benefit)	24.7	(12.8)
Equity method loss, net of tax	0.0	18.6
Net Earnings (Loss) from Continuing Operations, Including Noncontrolling Interests	93.7	(44.4)
Less: Net earnings attributable to noncontrolling interests from continuing operations	1.8	0.3
Net Earnings (Loss) from Continuing Operations	91.9	(44.7)
Net earnings from discontinued operations, net of tax and noncontrolling interest	0.0	23.9
Net Earnings (Loss)	$ 91.9	$ (20.8)
Earnings Per Share [Abstract]
Earnings from Continuing Operations, Per Basic Share	$ 1.66	$ (0.64)
Earnings from Continuing Operations, Per Diluted Share	1.52	(0.64)
Earnings from Discontinued Operation, Per Basic Share	0	0.38
Earnings from Discontinued Operation, Per Diluted Share	0	0.38
Earnings, Per Basic Share	1.66	(0.25)
Earnings, Per Diluted Share	$ 1.52	$ (0.25)
Weighted Average Number of Shares Outstanding
Weighted-Average Common Shares Outstanding, Basic (in shares)	58.8	62.5
Weighted-Average Common Shares Outstanding, Diluted (in shares)	65.8	62.5