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INVESTMENT IN UNCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Apr. 01, 2019 | Mar. 19, 2019 | Jan. 02, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2017
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |
Loans receivable, carrying value | $ 66.4 |  |  |  | $ 35.8 | $ 100.0 |  |
Gain from change in fair value of loans receivable |  |  |  | $ 12.5 |  |  |  |
Loans receivable, fair value |  |  |  | $ 78.9 |  |  |  |
Investment, estimated fair value | $ 23.3 |  |  |  |  |  |  |
Investment in unconsolidated affiliates |  |  |  |  | 207.0 | 0.0 |  |
Equity in income of unconsolidated affiliates |  |  |  |  | 14.4 | 0.0 | $ 3.3 |
Proceeds from sale of investment in unconsolidated affiliates |  |  |  |  |  | 0.0 | 274.3 |
Distributions intended to cover required tax payments |  |  |  |  | (538.6) | $ 46.9 | 255.2 |
Bonnie Plants, LLC |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |
Percent ownership | 50.00% |  |  |  |  |  |  |
Payments to acquire equity interest | $ 102.3 |  |  |  |  |  |  |
Investment in unconsolidated affiliates | $ 202.9 |  |  |  |  |  |  |
Distributions from equity method investment |  |  |  |  | $ 12.0 |  |  |
TruGreen Joint Venture |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |
Percent ownership sold |  |  | 30.00% |  |  |  |  |
U.S. Consumer | Industrial Turf and Ornamental Market Investment |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |
Proceeds from sale of investment in unconsolidated affiliates |  | $ 36.6 |  |  |  |  |  |
Gain on sale of investments |  |  |  |  |  |  | 2.9 |
Investments in and advance to affiliates, subsidiaries, associates, and joint ventures |  |  |  |  |  |  |  | $ 29.4
Distribution of earnings from unconsolidated affiliate |  |  |  |  |  |  | 4.9 |
Outdoor Home Services Holdings LLC | TruGreen Joint Venture |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |
Proceeds from sale of investment in unconsolidated affiliates |  |  | $ 234.2 |  |  |  |  |
Proceeds collection of second lien term loan financing |  |  | $ 18.4 |  |  |  |  |
Distributions intended to cover required tax payments |  |  |  |  |  |  | 3.5 |
Gain on sale of investments |  |  |  |  |  |  | 259.8 |
Tax payments due to sale of equity interest |  |  |  |  |  |  | $ 99.5 |

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