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v3.23.2

SEGMENT INFORMATION (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Jun. 30, 2023 USD ($) segment | Jun. 30, 2022 USD ($)
Segment information |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  | 6 |
Operating revenues | $ 1,830.0 |  | $ 2,127.9 |  | $ 4,718.1 | $ 5,036.0
Other operation and maintenance | 496.0 |  | 449.0 |  | 1,030.0 | 903.4
Depreciation and amortization | 313.9 |  | 279.6 |  | 619.4 | 557.7
Equity in earnings of transmission affiliates | 43.6 |  | 43.0 |  | 87.4 | 84.7
Interest expense | 178.7 |  | 119.8 |  | 350.9 | 237.4
Income tax expense (benefit) | 48.5 |  | 63.4 |  | 122.6 | 190.5
Net income (loss) | 290.0 |  | 287.8 |  | 797.6 | 855.8
Net income (loss) attributed to common shareholders | 289.7 | $ 507.5 | 287.5 | $ 565.9 | 797.2 | 853.4
External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 1,830.0 |  | 2,127.9 |  | 4,718.1 | 5,036.0
Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Utility operations |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | 478.9 |  | 439.9 |  | 998.1 | 890.7
Depreciation and amortization | 279.4 |  | 255.3 |  | 555.6 | 509.2
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 175.6 |  | 156.8 |  | 352.0 | 314.1
Income tax expense (benefit) | 65.8 |  | 71.4 |  | 184.9 | 219.3
Net income (loss) | 219.7 |  | 207.8 |  | 623.5 | 641.1
Net income (loss) attributed to common shareholders | 219.4 |  | 207.5 |  | 622.9 | 640.5
Utility operations | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 1,779.9 |  | 2,099.7 |  | 4,625.9 | 4,965.0
Utility operations | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Reconciling eliminations |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | (3.9) |  | (3.9) |  | (5.5) | (5.5)
Depreciation and amortization | (19.1) |  | (16.8) |  | (37.6) | (33.1)
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | (88.8) |  | (83.8) |  | (173.3) | (168.2)
Income tax expense (benefit) | 0.0 |  | 0.0 |  | 0.0 | 0.0
Net income (loss) | 0.0 |  | 0.0 |  | 0.0 | 0.0
Net income (loss) attributed to common shareholders | 0.0 |  | 0.0 |  | 0.0 | 0.0
Reconciling eliminations | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Reconciling eliminations | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | $ (119.0) |  | (115.5) |  | $ (243.1) | (232.4)
ATC |  |  |  |  |  |
Segment information |  |  |  |  |  |
Ownership interest (as a percent) | 60.00% |  |  |  | 60.00% |
Equity in earnings of transmission affiliates | $ 43.1 |  | 42.6 |  | $ 86.0 | 83.6
ATC Holdco |  |  |  |  |  |
Segment information |  |  |  |  |  |
Ownership interest (as a percent) | 75.00% |  |  |  | 75.00% |
Equity in earnings of transmission affiliates | $ 0.5 |  | 0.4 |  | $ 1.4 | 1.1
Wisconsin |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 1,424.5 |  | 1,557.4 |  | 3,420.8 | 3,499.7
Wisconsin | Utility operations |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | 351.8 |  | 337.9 |  | 732.6 | 650.5
Depreciation and amortization | 210.3 |  | 187.7 |  | 417.6 | 374.8
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 150.1 |  | 135.6 |  | 300.7 | 271.9
Income tax expense (benefit) | 53.6 |  | 49.3 |  | 119.5 | 144.7
Net income (loss) | 185.9 |  | 148.7 |  | 443.4 | 437.1
Net income (loss) attributed to common shareholders | 185.6 |  | 148.4 |  | 442.8 | 436.5
Wisconsin | Utility operations | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 1,424.5 |  | 1,557.4 |  | 3,420.8 | 3,499.7
Wisconsin | Utility operations | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Illinois |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 273.5 |  | 442.4 |  | 873.2 | 1,124.5
Illinois | Utility operations |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | 105.3 |  | 79.1 |  | 219.0 | 192.7
Depreciation and amortization | 58.5 |  | 57.4 |  | 117.0 | 114.2
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 21.4 |  | 18.0 |  | 43.0 | 35.7
Income tax expense (benefit) | 10.9 |  | 21.2 |  | 52.9 | 63.3
Net income (loss) | 30.1 |  | 56.4 |  | 143.2 | 169.8
Net income (loss) attributed to common shareholders | 30.1 |  | 56.4 |  | 143.2 | 169.8
Illinois | Utility operations | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 273.5 |  | 442.4 |  | 873.2 | 1,124.5
Illinois | Utility operations | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Other States |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 81.9 |  | 99.9 |  | 331.9 | 340.8
Other States | Utility operations |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | 21.8 |  | 22.9 |  | 46.5 | 47.5
Depreciation and amortization | 10.6 |  | 10.2 |  | 21.0 | 20.2
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 4.1 |  | 3.2 |  | 8.3 | 6.5
Income tax expense (benefit) | 1.3 |  | 0.9 |  | 12.5 | 11.3
Net income (loss) | 3.7 |  | 2.7 |  | 36.9 | 34.2
Net income (loss) attributed to common shareholders | 3.7 |  | 2.7 |  | 36.9 | 34.2
Other States | Utility operations | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 81.9 |  | 99.9 |  | 331.9 | 340.8
Other States | Utility operations | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Electric Transmission |  |  |  |  |  |
Segment information |  |  |  |  |  |
Other operation and maintenance | 0.0 |  | 0.0 |  | 0.0 | 0.0
Depreciation and amortization | 0.0 |  | 0.0 |  | 0.0 | 0.0
Equity in earnings of transmission affiliates | 43.6 |  | 43.0 |  | 87.4 | 84.7
Interest expense | 4.8 |  | 4.8 |  | 9.6 | 9.7
Income tax expense (benefit) | 9.7 |  | 9.3 |  | 19.4 | 18.2
Net income (loss) | 29.1 |  | 29.0 |  | 58.4 | 56.8
Net income (loss) attributed to common shareholders | 29.1 |  | 29.0 |  | 58.4 | 56.8
Electric Transmission | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.0 |  | 0.0 |  | 0.0 | 0.0
Electric Transmission | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | $ 0.0 |  | 0.0 |  | $ 0.0 | 0.0
Electric Transmission | ATC |  |  |  |  |  |
Segment information |  |  |  |  |  |
Ownership interest (as a percent) | 60.00% |  |  |  | 60.00% |
Electric Transmission | ATC Holdco |  |  |  |  |  |
Segment information |  |  |  |  |  |
Ownership interest (as a percent) | 75.00% |  |  |  | 75.00% |
Non-Utility Energy Infrastructure |  |  |  |  |  |
Segment information |  |  |  |  |  |
Natural gas storage needs provided to Wisconsin utilities |  |  |  |  | 33.00% |
Operating revenues | $ 169.0 |  | 143.6 |  | $ 335.2 | 303.1
Other operation and maintenance | 20.3 |  | 13.9 |  | 38.1 | 24.8
Depreciation and amortization | 48.4 |  | 34.3 |  | 91.1 | 68.3
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 25.1 |  | 17.4 |  | 45.0 | 34.6
Income tax expense (benefit) | (19.7) |  | (7.3) |  | (37.5) | (12.2)
Net income (loss) | 85.9 |  | 80.3 |  | 174.2 | 173.6
Net income (loss) attributed to common shareholders | 85.9 |  | 80.3 |  | 174.4 | 171.8
Non-Utility Energy Infrastructure | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 50.0 |  | 28.1 |  | 92.1 | 70.7
Non-Utility Energy Infrastructure | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 119.0 |  | 115.5 |  | 243.1 | 232.4
Corporate and Other |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.1 |  | 0.1 |  | 0.1 | 0.3
Other operation and maintenance | 0.7 |  | (0.9) |  | (0.7) | (6.6)
Depreciation and amortization | 5.2 |  | 6.8 |  | 10.3 | 13.3
Equity in earnings of transmission affiliates | 0.0 |  | 0.0 |  | 0.0 | 0.0
Interest expense | 62.0 |  | 24.6 |  | 117.6 | 47.2
Income tax expense (benefit) | (7.3) |  | (10.0) |  | (44.2) | (34.8)
Net income (loss) | (44.7) |  | (29.3) |  | (58.5) | (15.7)
Net income (loss) attributed to common shareholders | (44.7) |  | (29.3) |  | (58.5) | (15.7)
Corporate and Other | External revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | 0.1 |  | 0.1 |  | 0.1 | 0.3
Corporate and Other | Intersegment revenues |  |  |  |  |  |
Segment information |  |  |  |  |  |
Operating revenues | $ 0.0 |  | $ 0.0 |  | $ 0.0 | $ 0.0

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