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OPERATING REVENUES - DISAGGREGATION OF OPERATING REVENUES BY SEGMENT (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Operating Revenues |  |
Total operating revenues | $ 2,691.4 | $ 2,108.6
Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 2,669.0 | 2,086.9
Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 22.4 | 21.7
Total regulated revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 2,642.7 | 2,067.3
Electric | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,095.0 | 1,034.6
Natural gas | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,547.7 | 1,032.7
Other non-utility revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 26.3 | 19.6
Reconciling Eliminations |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | (114.7) | (114.4)
Reconciling Eliminations | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | (14.9) | (15.7)
Reconciling Eliminations | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | (99.8) | (98.7)
Reconciling Eliminations | Total regulated revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | (13.3) | (14.1)
Reconciling Eliminations | Electric | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Reconciling Eliminations | Natural gas | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | (13.3) | (14.1)
Reconciling Eliminations | Other non-utility revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | (1.6) | (1.6)
Total Utility Operations |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 2,668.4 | 2,092.9
Total Utility Operations | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 22.3 | 21.6
Total Utility Operations | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 2,646.1 | 2,071.3
Total Utility Operations | Total regulated revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 2,641.4 | 2,066.9
Total Utility Operations | Electric | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,095.0 | 1,034.6
Total Utility Operations | Natural gas | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,546.4 | 1,032.3
Total Utility Operations | Other non-utility revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 4.7 | 4.4
Wisconsin |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 1,731.7 | 1,498.9
Wisconsin | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 9.4 | 5.4
Wisconsin | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,722.3 | 1,493.5
Wisconsin | Total regulated revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,722.3 | 1,493.5
Wisconsin | Electric | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 1,095.0 | 1,034.6
Wisconsin | Natural gas | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 627.3 | 458.9
Wisconsin | Other non-utility revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Illinois |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 703.4 | 447.6
Illinois | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 9.9 | 14.0
Illinois | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 693.5 | 433.6
Illinois | Total regulated revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 693.5 | 433.6
Illinois | Electric | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Illinois | Natural gas | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 693.5 | 433.6
Illinois | Other non-utility revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Other States |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 233.3 | 146.4
Other States | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 3.0 | 2.2
Other States | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 230.3 | 144.2
Other States | Total regulated revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 225.6 | 139.8
Other States | Electric | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Other States | Natural gas | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 225.6 | 139.8
Other States | Other non-utility revenues | Transferred over time | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 4.7 | 4.4
Non-Utility Energy Infrastructure |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 137.6 | 129.6
Non-Utility Energy Infrastructure | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 37.8 | 30.9
Non-Utility Energy Infrastructure | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 99.8 | 98.7
Non-Utility Energy Infrastructure | Total regulated revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 14.6 | 14.5
Non-Utility Energy Infrastructure | Electric | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Non-Utility Energy Infrastructure | Natural gas | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 14.6 | 14.5
Non-Utility Energy Infrastructure | Other non-utility revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 23.2 | 16.4
Corporate and Other |  |
Disaggregation of Operating Revenues |  |
Total operating revenues | 0.1 | 0.5
Corporate and Other | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.4
Corporate and Other | Other operating revenues |  |
Disaggregation of Operating Revenues |  |
Other operating revenues | 0.1 | 0.1
Corporate and Other | Total regulated revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Corporate and Other | Electric | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Corporate and Other | Natural gas | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | 0.0 | 0.0
Corporate and Other | Other non-utility revenues | Revenues from contracts with customers |  |
Disaggregation of Operating Revenues |  |
Revenues from contracts with customers | $ 0.0 | $ 0.4

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