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Leases - Right of Use Assets (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Right of use assets |  |
Total finance lease right of use assets | $ 57.0 | $ 40.6
Operating lease right of use assets | 20.7 | 41.4
Power Purchase Contract |  |
Right of use assets |  |
Under finance lease | 140.3 | 140.3
Accumulated amortization | (132.3) | (126.6)
Total finance lease right of use assets | 8.0 | 13.7
Two Creeks |  |
Right of use assets |  |
Under finance lease | 7.7 | 7.7
Accumulated amortization | (0.2) | (0.1)
Total finance lease right of use assets | 7.5 | 7.6
Badger Hollow I |  |
Right of use assets |  |
Under finance lease | 19.5 | 19.5
Accumulated amortization | (0.6) | (0.2)
Total finance lease right of use assets | 18.9 | 19.3
Badger Hollow II |  |
Right of use assets |  |
Under finance lease | 22.8 | 0.0
Accumulated amortization | (0.2) | 0.0
Total finance lease right of use assets | $ 22.6 | $ 0.0

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