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Long-Term Debt - Issuances and Redemptions (Details) - USD ($) $ in Millions | 1 Months Ended
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Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Sep. 30, 2022
WE 4.75% Debentures due September 30, 2032 | WE |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  |  |  | $ 500.0
Interest rate |  |  |  | 4.75%
WPS 5.35% Senior Notes due November 10, 2025 | WPS |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  |  | $ 300.0 |
Interest rate |  |  | 5.35% |
5.23% PGL Series MMM due December 1, 2027 | PGL |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  | $ 100.0 |  |
Interest rate |  | 5.23% |  |
6.38% WECI Wind Holding II LLC Senior Notes Due 2031 | WECI Wind Holding II |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  | $ 199.3 |  |
Interest rate |  | 6.38% |  |
WEC Energy Group | WEC 5.00% Senior Notes Due September 27, 2025 |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  |  |  | $ 500.0
Interest rate |  |  |  | 5.00%
WEC Energy Group | WEC 5.15% Senior Notes Due October 1, 2027 |  |  |  |
Long-term debt |  |  |  |
Issuance of debt |  |  |  | $ 400.0
Interest rate |  |  |  | 5.15%
WEC Energy Group | WEC 4.75% Senior Notes due January 9, 2026 | Subsequent event |  |  |  |
Long-term debt |  |  |  |
Issuance of debt | $ 650.0 |  |  |
Interest rate | 4.75% |  |  |
WEC Energy Group | WEC 4.75% $450M Senior Notes due January 15, 2028 | Subsequent event |  |  |  |
Long-term debt |  |  |  |
Issuance of debt | $ 450.0 |  |  |
Interest rate | 4.75% |  |  |

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