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DISCONTINUED OPERATIONS - Additional Information (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 31, 2017 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Financing receivables, initial term (in years) |  | 3 years |  |
Cash provided by (used in) operating activities from discontinued operations |  | $ 0.0 | $ 3.6 | $ (38.6)
Cash provided by (used in) investing activities from discontinued operations |  | 0.0 | 0.0 | 0.0
International Business |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Vendor financing loan | $ 29.7 |  |  |
Financing loan term (in years) | 7 years |  |  |
Annual interest rate | 5.00% |  |  |
Annual interest rate increases | 2.50% |  |  |
Contingent consideration maximum payout | $ 23.8 |  |  |
Fair value of contingent consideration | $ 18.2 |  |  |
International Business | Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Contingent consideration payout |  | 6.0 |  |
Pre-tax charge |  | $ 12.2 |  |
Wild Bird Food |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Favorable adjustment to previously disclosed legal matter |  |  |  | 22.5
Insurance reimbursement recoveries |  |  | $ 1.5 | $ 13.4

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