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Leases - Finance and Operating Lease Right of Use Assets and Obligations (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Leases |  |
Operating lease right of use assets | $ 15.7 | $ 19.5
Finance lease right of use assets | 175.3 | 124.0
Current operating lease liabilities | 4.0 | 3.7
Long-term operating lease liabilities | 25.4 | 29.1
Current finance lease liabilities | 72.7 |
Long-term finance lease liabilities | 110.5 | 51.3
Accumulated amortization | $ 146.3 | $ 139.7
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other | Other
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, plant, and equipment, net of accumulated depreciation and amortization of $10,383.8 and $9,889.3, respectively | Property, plant, and equipment, net of accumulated depreciation and amortization of $10,383.8 and $9,889.3, respectively
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other | Other
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other | Other
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Current portion of long-term debt (December 31, 2022 and December 31, 2021 include $8.9 and $8.8, respectively, related to WEPCo Environmental Trust) | Current portion of long-term debt (December 31, 2022 and December 31, 2021 include $8.9 and $8.8, respectively, related to WEPCo Environmental Trust)
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Long-term debt (December 31, 2022 and December 31, 2021 include $94.1 and $102.7, respectively, related to WEPCo Environmental Trust) | Long-term debt (December 31, 2022 and December 31, 2021 include $94.1 and $102.7, respectively, related to WEPCo Environmental Trust)
Power purchase commitment |  |
Leases |  |
Finance lease right of use assets | $ 71.8 | $ 76.7
Current finance lease liabilities | 72.7 | 78.4
Long-term finance lease liabilities | 0.0 |
Land lease - utility solar generation |  |
Leases |  |
Finance lease right of use assets | 102.4 | 47.0
Current finance lease liabilities | 0.0 |
Long-term finance lease liabilities | 109.3 | 51.0
Other |  |
Leases |  |
Finance lease right of use assets | 1.1 | 0.3
Current finance lease liabilities | 0.0 |
Long-term finance lease liabilities | $ 1.2 | $ 0.3

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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