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v3.25.0.1

Segment Information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) numberOfSegments | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Segment information |  |  |  |
Number of reportable segments | numberOfSegments | 6 |  |  |
Operating revenues | $ 8,599.9 | $ 8,893.0 | $ 9,597.4 |
Fuel and purchased power | 1,455.7 | 1,615.9 | 1,881.4 |
Cost of natural gas sold | 1,200.3 | 1,575.3 | 2,477.5 |
Other operation and maintenance | 2,158.0 | 2,100.5 | 1,938.0 |
Impairment related to ICC disallowances | 12.1 | 178.9 | 0.0 |
Depreciation and amortization | 1,354.5 | 1,264.2 | 1,122.6 |
Property and revenue taxes | 266.5 | 250.2 | 253.7 |
Equity in earnings of transmission affiliates | 207.5 | 177.5 | 194.7 |
Other income, net | 178.2 | 177.7 | 128.8 |
Interest expense | 815.3 | 727.4 | 515.1 |
Gain on debt extinguishments | (23.1) | (0.5) | 0.0 |
Income tax expense (benefit) | 222.0 | 204.6 | 322.9 |
Preferred stock dividends of subsidiary | 1.2 | 1.2 | 1.2 |
Net (income) loss attributed to noncontrolling interests | 4.1 | 1.2 | (0.4) |
Net income (loss) attributed to common shareholders | 1,527.2 | 1,331.7 | 1,408.1 |
Capital expenditures and asset acquisitions | 3,774.8 | 3,507.9 | 2,696.9 |
Equity method investments | 2,191.6 | 2,081.6 | 1,981.9 |
Total assets | 47,363.2 | 43,939.7 | 41,872.1 |
Reconciling eliminations |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | (46.0) | (60.1) | (51.9) |
Other operation and maintenance | (9.1) | (9.1) | (9.1) |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | (88.5) | (77.5) | (68.1) |
Property and revenue taxes | 0.0 | 0.0 | 0.0 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | (31.7) | (20.5) | (2.3) |
Interest expense | (362.2) | (350.2) | (336.2) |
Gain on debt extinguishments | 0.0 | 0.0 |  |
Income tax expense (benefit) | 0.0 | 0.0 | 0.0 |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 0.0 | 0.0 | 0.0 |
Capital expenditures and asset acquisitions | 0.0 | 0.0 | 0.0 |
Equity method investments | 0.0 | 0.0 | 0.0 |
Total assets | (3,553.6) | (3,640.1) | (3,256.5) |
Reconciling eliminations | WE |  |  |  |
Segment information |  |  |  |
Total assets | 1,525.4 | 1,630.6 | 1,632.9 |
Wisconsin | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 6,330.5 | 6,625.9 | 6,960.5 |
Illinois | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 1,602.4 | 1,557.8 | 1,890.9 |
Other States | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 449.8 | 519.1 | 618.5 |
Electric transmission | Operating segments |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | 0.0 | 0.0 | 0.0 |
Other operation and maintenance | 0.0 | 0.0 | 0.0 |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | 0.0 | 0.0 | 0.0 |
Property and revenue taxes | 0.0 | 0.0 | 0.0 |
Equity in earnings of transmission affiliates | 207.5 | 177.5 | 194.7 |
Other income, net | 0.0 | 0.0 | 0.0 |
Interest expense | 19.4 | 19.4 | 19.4 |
Gain on debt extinguishments | 0.0 | 0.0 |  |
Income tax expense (benefit) | 47.1 | 39.0 | 45.8 |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 141.0 | 119.1 | 129.5 |
Capital expenditures and asset acquisitions | 0.0 | 0.0 | 0.0 |
Equity method investments | 2,108.9 | 2,005.9 | 1,909.2 |
Total assets | $ 2,126.0 | 2,006.0 | 1,909.4 |
Non-Utility Energy Infrastructure |  |  |  |
Segment information |  |  |  |
Natural gas storage needs provided to Wisconsin utilities | 33.00% |  |  |
Non-Utility Energy Infrastructure | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | $ 691.3 | 666.5 | 590.0 |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | 9.1 | 20.5 | 17.9 |
Other operation and maintenance | 75.1 | 80.1 | 51.0 |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | 198.4 | 188.7 | 139.2 |
Property and revenue taxes | 15.7 | 16.5 | 9.1 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 1.0 | 0.0 | 0.0 |
Interest expense | 99.7 | 94.3 | 68.9 |
Gain on debt extinguishments | 0.0 | 0.0 |  |
Income tax expense (benefit) | (82.4) | (68.4) | (20.9) |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 4.1 | 1.2 | (0.4) |
Net income (loss) attributed to common shareholders | 380.8 | 336.0 | 324.4 |
Capital expenditures and asset acquisitions | 945.8 | 754.4 | 483.8 |
Equity method investments | 0.0 | 0.0 | 0.0 |
Total assets | 7,316.0 | 6,404.7 | 5,320.6 |
Corporate and other | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.1 | 0.5 |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | 0.0 | 0.0 | 0.0 |
Other operation and maintenance | (11.3) | 5.8 | (12.9) |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | 22.3 | 20.9 | 25.0 |
Property and revenue taxes | 0.3 | 0.2 | 0.1 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 54.4 | 53.3 | 14.6 |
Interest expense | 310.0 | 258.1 | 119.4 |
Gain on debt extinguishments | (23.1) | (0.5) |  |
Income tax expense (benefit) | (79.5) | (68.3) | (45.7) |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | (164.3) | (162.8) | (70.8) |
Capital expenditures and asset acquisitions | 20.6 | 25.8 | 16.3 |
Equity method investments | 67.0 | 61.3 | 59.1 |
Total assets | 1,037.3 | 1,100.1 | 774.0 |
Public utilities |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 1,455.7 | 1,615.9 | 1,881.4 |
Cost of natural gas sold | 1,237.2 | 1,614.9 | 2,511.5 |
Other operation and maintenance | 2,103.3 | 2,023.7 | 1,909.0 |
Impairment related to ICC disallowances | 12.1 | 178.9 |  |
Depreciation and amortization | 1,222.3 | 1,132.1 | 1,026.5 |
Property and revenue taxes | 250.5 | 233.5 | 244.5 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 154.5 | 144.9 | 116.5 |
Interest expense | 748.4 | 705.8 | 643.6 |
Gain on debt extinguishments | 0.0 | 0.0 |  |
Income tax expense (benefit) | 336.8 | 302.3 | 343.7 |
Preferred stock dividends of subsidiary | 1.2 | 1.2 | 1.2 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 1,169.7 | 1,039.4 | 1,025.0 |
Capital expenditures and asset acquisitions | 2,808.4 | 2,727.7 | 2,196.8 |
Equity method investments | 15.7 | 14.4 | 13.6 |
Total assets | 40,437.5 | 38,069.0 | 37,124.6 |
Public utilities | Wisconsin |  |  |  |
Segment information |  |  |  |
Gain on debt extinguishments |  | 0.0 |  |
Public utilities | Wisconsin | Operating segments |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 1,455.7 | 1,615.9 | 1,881.4 |
Cost of natural gas sold | 661.9 | 894.7 | 1,327.4 |
Other operation and maintenance | 1,547.9 | 1,531.3 | 1,351.3 |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | 919.9 | 851.5 | 754.7 |
Property and revenue taxes | 169.6 | 179.2 | 182.6 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 146.6 | 137.6 | 99.9 |
Interest expense | 637.3 | 601.0 | 555.9 |
Gain on debt extinguishments | 0.0 |  |  |
Income tax expense (benefit) | 220.5 | 237.4 | 247.5 |
Preferred stock dividends of subsidiary | 1.2 | 1.2 | 1.2 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 863.1 | 851.3 | 758.4 |
Capital expenditures and asset acquisitions | 2,347.1 | 2,134.4 | 1,610.8 |
Equity method investments | 15.7 | 14.4 | 13.6 |
Total assets | 30,622.7 | 28,527.3 | 27,384.0 |
Public utilities | Illinois |  |  |  |
Segment information |  |  |  |
Gain on debt extinguishments |  | 0.0 |  |
Public utilities | Illinois | Operating segments |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | 376.7 | 443.0 | 792.5 |
Other operation and maintenance | 461.5 | 397.9 | 459.2 |
Impairment related to ICC disallowances | 12.1 | 178.9 |  |
Depreciation and amortization | 255.4 | 237.3 | 230.9 |
Property and revenue taxes | 59.9 | 29.9 | 38.6 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 7.6 | 6.7 | 14.1 |
Interest expense | 94.7 | 88.9 | 73.8 |
Gain on debt extinguishments | 0.0 |  |  |
Income tax expense (benefit) | 97.6 | 48.6 | 83.1 |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 252.1 | 140.0 | 226.9 |
Capital expenditures and asset acquisitions | 343.0 | 489.8 | 484.9 |
Equity method investments | 0.0 | 0.0 | 0.0 |
Total assets | 8,168.8 | 7,970.2 | 8,101.0 |
Public utilities | Other States |  |  |  |
Segment information |  |  |  |
Gain on debt extinguishments |  | 0.0 |  |
Public utilities | Other States | Operating segments |  |  |  |
Segment information |  |  |  |
Fuel and purchased power | 0.0 | 0.0 | 0.0 |
Cost of natural gas sold | 198.6 | 277.2 | 391.6 |
Other operation and maintenance | 93.9 | 94.5 | 98.5 |
Impairment related to ICC disallowances | 0.0 | 0.0 |  |
Depreciation and amortization | 47.0 | 43.3 | 40.9 |
Property and revenue taxes | 21.0 | 24.4 | 23.3 |
Equity in earnings of transmission affiliates | 0.0 | 0.0 | 0.0 |
Other income, net | 0.3 | 0.6 | 2.5 |
Interest expense | 16.4 | 15.9 | 13.9 |
Gain on debt extinguishments | 0.0 |  |  |
Income tax expense (benefit) | 18.7 | 16.3 | 13.1 |
Preferred stock dividends of subsidiary | 0.0 | 0.0 | 0.0 |
Net (income) loss attributed to noncontrolling interests | 0.0 | 0.0 | 0.0 |
Net income (loss) attributed to common shareholders | 54.5 | 48.1 | 39.7 |
Capital expenditures and asset acquisitions | 118.3 | 103.5 | 101.1 |
Equity method investments | 0.0 | 0.0 | 0.0 |
Total assets | 1,646.0 | 1,571.5 | 1,639.6 |
External revenues |  |  |  |
Segment information |  |  |  |
Operating revenues | 8,599.9 | 8,893.0 | 9,597.4 |
External revenues | Reconciling eliminations |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
External revenues | Electric transmission | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
External revenues | Non-Utility Energy Infrastructure | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 217.2 | 190.1 | 127.0 |
External revenues | Corporate and other | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.1 | 0.5 |
External revenues | Public utilities |  |  |  |
Segment information |  |  |  |
Operating revenues | 8,382.7 | 8,702.8 | 9,469.9 |
External revenues | Public utilities | Wisconsin | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 6,330.5 | 6,625.9 | 6,960.5 |
External revenues | Public utilities | Illinois | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 1,602.4 | 1,557.8 | 1,890.9 |
External revenues | Public utilities | Other States | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 449.8 | 519.1 | 618.5 |
Intersegment revenues |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Reconciling eliminations |  |  |  |
Segment information |  |  |  |
Operating revenues | (474.1) | (476.4) | (463.0) |
Intersegment revenues | Electric transmission | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Non-Utility Energy Infrastructure | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 474.1 | 476.4 | 463.0 |
Intersegment revenues | Corporate and other | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Public utilities |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Public utilities | Wisconsin | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Public utilities | Illinois | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | 0.0 | 0.0 | 0.0 |
Intersegment revenues | Public utilities | Other States | Operating segments |  |  |  |
Segment information |  |  |  |
Operating revenues | $ 0.0 | 0.0 | 0.0 |
ATC |  |  |  |
Segment information |  |  |  |
Equity method investment, ownership interest (as a percent) | 60.00% |  |  |
Equity method investments | $ 2,085.1 | 1,980.8 | 1,884.6 | $ 1,766.9
ATC | Electric transmission |  |  |  |
Segment information |  |  |  |
Equity method investment, ownership interest (as a percent) | 60.00% |  |  |
ATC Holdco |  |  |  |
Segment information |  |  |  |
Equity method investment, ownership interest (as a percent) | 75.00% |  |  |
Equity method investments | $ 23.8 | $ 25.1 | $ 24.6 | $ 22.5
ATC Holdco | Electric transmission |  |  |  |
Segment information |  |  |  |
Equity method investment, ownership interest (as a percent) | 75.00% |  |  |

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