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Long-Term Debt - Debt Outstanding (Details) $ in Millions | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Nov. 15, 2021 USD ($) number_of_interest_rate_swaps
--- | --- | --- | ---
Long-term debt |  |  |
Total | $ 15,559.8 | $ 13,652.6 |
Integrys acquisition fair value adjustment | 1.2 | 2.9 |
Long-term debt, including current portion | 15,464.2 | 13,563.4 |
Unamortized debt issuance costs | (81.8) | (77.7) |
Unamortized discount, net and other | (22.3) | (21.7) |
Current portion of long-term debt | (808.5) | (91.0) |
Long-term debt | 14,655.7 | 13,472.4 |
Finance lease obligation | $ 183.2 | $ 129.7 |
WE |  |  |
Long-term debt |  |  |
Weighted average interest rate | 4.22% | 4.13% |
Unsecured debt | $ 3,285.0 | $ 2,785.0 |
WEPCo Environmental Trust Finance I, LLC |  |  |
Long-term debt |  |  |
Weighted average interest rate | 1.58% | 1.58% |
Secured debt | $ 105.9 | $ 114.7 |
WPS |  |  |
Long-term debt |  |  |
Weighted average interest rate | 4.11% | 3.89% |
Senior notes | $ 1,975.0 | $ 1,675.0 |
WG |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.35% | 3.35% |
Unsecured debt | $ 790.0 | $ 790.0 |
Integrys | 6.00% Integrys junior notes |  |  |
Long-term debt |  |  |
Weighted average interest rate | 6.00% | 6.00% |
Unsecured debt | $ 221.4 | $ 221.4 |
PGL |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.41% | 3.31% |
Secured debt | $ 1,970.0 | $ 1,870.0 |
PGL | Collateralized First Mortgage Bonds |  |  |
Long-term debt |  |  |
Secured debt | $ 100.0 |  |
NSG |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.56% | 3.56% |
Secured debt | $ 157.0 | $ 157.0 |
MERC |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.04% | 3.04% |
Senior notes | $ 210.0 | $ 210.0 |
MGU |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.18% | 3.18% |
Senior notes | $ 150.0 | $ 150.0 |
UMERC |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.26% | 3.26% |
Senior notes | $ 160.0 | $ 160.0 |
Bluewater Gas Storage |  |  |
Long-term debt |  |  |
Weighted average interest rate | 3.76% | 3.76% |
Senior notes | $ 112.6 | $ 115.2 |
ATC Holding LLC |  |  |
Long-term debt |  |  |
Weighted average interest rate | 4.05% | 4.05% |
Senior notes | $ 475.0 | $ 475.0 |
We Power |  |  |
Long-term debt |  |  |
Weighted average interest rate | 5.62% | 5.60% |
Secured debt | $ 896.5 | $ 934.7 |
WECC |  |  |
Long-term debt |  |  |
Weighted average interest rate | 6.94% | 6.94% |
Unsecured debt | $ 50.0 | $ 50.0 |
WECI Wind Holding I |  |  |
Long-term debt |  |  |
Weighted average interest rate | 2.75% | 2.75% |
Senior notes | $ 332.1 | $ 374.6 |
WECI Wind Holding II |  |  |
Long-term debt |  |  |
Weighted average interest rate | 6.38% | 0.00% |
Senior notes | $ 199.3 | $ 0.0 |
Jayhawk Wind LLC |  |  |
Long-term debt |  |  |
Long-term debt, including current portion | $ 7.3 | $ 7.3 |
WEC Energy Group |  |  |
Long-term debt |  |  |
Weighted average interest rate | 2.44% | 1.67% |
Senior notes | $ 3,970.0 | $ 3,070.0 |
Current portion of long-term debt | (700.0) | 0.0 |
Long-term debt | $ 3,747.2 | $ 3,549.8 |
WEC Energy Group | WEC Energy Group junior notes due 2067 |  |  |
Long-term debt |  |  |
Weighted average interest rate | 6.72% | 2.27% |
Unsecured debt | $ 500.0 | $ 500.0 | $ 500.0
Interest rate | 6.72% | 2.27% |
WEC Energy Group | 6.20% WEC Energy Group senior notes |  |  |
Long-term debt |  |  |
Interest rate | 6.20% |  |
WEC Energy Group | Interest rate swaps |  |  |
Long-term debt |  |  |
Number of interest rate swaps executed | number_of_interest_rate_swaps |  |  | 2
Interest rate swap fixed interest rate |  |  | 4.9765%
Interest rate swap notional value |  |  | $ 250.0

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