Discontinued Operations - Held for Sale Assets and Liabilities Consolidated Balance Sheets (Details) - Discontinued Operations, Held-for-sale - USD ($) $ in Millions	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 0.0	$ 59.0	$ 72.6
Receivables, net		524.3
Inventories, net		290.1
Prepaid expenses and other current assets		35.0
Property, plant and equipment, net		257.4
Goodwill and intangibles, net		139.8
Other noncurrent assets		158.6
Current assets held for sale		1,464.2
Trade and other payables		264.9
Accrued expenses and other liabilities		166.9
Long-term debt		30.7
Other current liabilities		76.8
Current liabilities held for sale		$ 539.3