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Long-Term Debt Schedule of current maturities of long-term debt (Details) $ in Millions | Dec. 31, 2019 USD ($)
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Current maturities of long-term debt [Line Items] |
Total | $ 686.9
WEC Energy Group |
Current maturities of long-term debt [Line Items] |
Total | $ 400.0
WEC Energy Group Senior Notes (unsecured) | WEC Energy Group |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 2.45%
Senior Notes, Current | $ 400.0
Integrys Senior Notes (unsecured) | Integrys Holding Inc |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 4.17%
Senior Notes, Current | $ 250.0
Bluewater Gas Storage Senior Notes (unsecured) | Bluewater Gas Storage, LLC |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 3.76%
Senior Notes, Current | $ 2.5
4.91% We Power Subsidiaries Notes - PWGS (secured, nonrecourse) | We Power |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 4.91%
Secured Debt, Current | $ 6.6
5.209%We Power Subsidiaries Notes - ERGS (secured, nonrecourse) | We Power |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 5.209%
Secured Debt, Current | $ 12.6
4.673% We Power Subsidiaries Notes - ERGS (secured, nonrecourse) | We Power |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 4.673%
Secured Debt, Current | $ 9.7
6.00% We Power Subsidiaries Notes - PWGS (secured, nonrecourse) | We Power |
Current maturities of long-term debt [Line Items] |
Debt Instrument, Interest Rate, Stated Percentage | 6.00%
Secured Debt, Current | $ 5.5

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