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Long-Term Debt - Maturities of Long-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Long-term debt maturing within one year |  |
2024 | $ 1,264.2 |
2025 | 1,685.5 |
2026 | 1,726.8 |
2027 | 1,230.7 |
2028 | 2,307.2 |
Thereafter | 8,509.9 |
Total | 16,724.3 | $ 15,559.8
WEC Energy Group |  |
Long-term debt maturing within one year |  |
2024 | 600.0 |
2025 | 620.0 |
2026 | 1,600.0 |
2027 | 900.0 |
2028 | 950.0 |
Thereafter | $ 1,150.0 |
WEC 0.80% $600M Senior Notes due March 2024 | WEC Energy Group |  |
Long-term debt maturing within one year |  |
Interest rate | 0.80% |
Principal amount of unsecured debt | $ 600.0 |
2.38% WG Debentures due November 2024 | WG |  |
Long-term debt maturing within one year |  |
Interest rate | 2.38% |
Principal amount of unsecured debt | $ 150.0 |
2.64% PGL Bonds due November 2024 | PGL |  |
Long-term debt maturing within one year |  |
Interest rate | 2.64% |
Principal amount of secured debt | $ 75.0 |
2.05% WE Debentures due December 2024 | WE |  |
Long-term debt maturing within one year |  |
Interest rate | 2.05% |
Principal amount of unsecured debt | $ 300.0 |
WEPCo Environmental Trust Bonds 1.578%, due 2035 | WEPCo Environmental Trust Finance I, LLC |  |
Long-term debt maturing within one year |  |
Interest rate | 1.58% |
Principal amount of unsecured debt | $ 9.0 |
3.76% Bluewater Gas Storage senior notes | Bluewater Gas Storage |  |
Long-term debt maturing within one year |  |
Interest rate | 3.76% |
Principal amount of senior notes | $ 2.9 |
4.91% We Power subsidiaries notes - PWGS | We Power |  |
Long-term debt maturing within one year |  |
Interest rate | 4.91% |
Principal amount of secured debt | $ 8.0 |
5.209% We Power subsidiaries notes - ERGS | We Power |  |
Long-term debt maturing within one year |  |
Interest rate | 5.209% |
Principal amount of secured debt | $ 15.5 |
4.673% We Power subsidiaries notes - ERGS | We Power |  |
Long-term debt maturing within one year |  |
Interest rate | 4.673% |
Principal amount of secured debt | $ 11.7 |
6.00% We Power subsidiaries notes - PWGS | We Power |  |
Long-term debt maturing within one year |  |
Interest rate | 6.00% |
Principal amount of secured debt | $ 7.0 |
2.75% WECI Wind Holding I senior notes | WECI Wind Holding I |  |
Long-term debt maturing within one year |  |
Interest rate | 2.75% |
Principal amount of senior notes | $ 61.3 |
6.38% WECI Wind Holding II LLC Senior Notes Due 2031 | WECI Wind Holding II |  |
Long-term debt maturing within one year |  |
Interest rate |  | 6.38%
Principal amount of senior notes | $ 23.8 |

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