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LEASES - FUTURE MINIMUM LEASE PAYMENTS (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Total operating leases |  |  |
Three months ended December 31, 2019 | $ 1.1 |  |
2020 | 6.9 |  |
2021 | 4.9 |  |
2022 | 4.9 |  |
2023 | 5.0 |  |
2024 | 4.8 |  |
Thereafter | 30.5 |  |
Total minimum lease payments | 58.1 |  |
Less: interest | (14.9) |  |
Present value of minimum lease payments | 43.2 | $ 48.8 |
Less: short-term lease liabilities | (4.4) |  |
Long-term lease liabilities | 38.8 |  |
Finance leases |  |  |
Three months ended December 31, 2019 | 2.2 |  |
2020 | 9.4 |  |
2021 | 10.3 |  |
2022 | 5.1 |  |
2023 | 0.9 |  |
2024 | 1.0 |  |
Thereafter | 80.5 |  |
Total minimum lease payments | 109.4 |  |
Less: interest | (61.0) |  |
Present value of minimum lease payments | 48.4 |  |
Less: short-term lease liabilities | (5.9) |  |
Long-term lease liabilities | 42.5 |  |
Capital lease |  |  |
Short-term liabilities under capital lease |  |  | $ 4.9
Long-term liabilities under capital lease |  |  | $ 18.4
Power Purchase Contract |  |  |
Finance leases |  |  |
Three months ended December 31, 2019 | 2.0 |  |
2020 | 8.8 |  |
2021 | 9.4 |  |
2022 | 4.2 |  |
2023 | 0.0 |  |
2024 | 0.0 |  |
Thereafter | 0.0 |  |
Total minimum lease payments | 24.4 |  |
Less: interest | (4.7) |  |
Present value of minimum lease payments | 19.7 |  |
Less: short-term lease liabilities | (5.9) |  |
Long-term lease liabilities | 13.8 |  |
Two Creeks Solar Project |  |  |
Finance leases |  |  |
Three months ended December 31, 2019 | 0.1 |  |
2020 | 0.2 |  |
2021 | 0.2 |  |
2022 | 0.2 |  |
2023 | 0.2 |  |
2024 | 0.2 |  |
Thereafter | 22.8 |  |
Total minimum lease payments | 23.9 |  |
Less: interest | (16.2) |  |
Present value of minimum lease payments | 7.7 |  |
Less: short-term lease liabilities | 0.0 |  |
Long-term lease liabilities | 7.7 |  |
Badger Hollow Solar Farm I |  |  |
Finance leases |  |  |
Three months ended December 31, 2019 | 0.1 |  |
2020 | 0.4 |  |
2021 | 0.7 |  |
2022 | 0.7 |  |
2023 | 0.7 |  |
2024 | 0.8 |  |
Thereafter | 57.7 |  |
Total minimum lease payments | 61.1 |  |
Less: interest | (40.1) |  |
Present value of minimum lease payments | 21.0 |  |
Less: short-term lease liabilities | 0.0 |  |
Long-term lease liabilities | $ 21.0 |  |

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