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v3.25.2

COMPREHENSIVE INCOME (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 27,364.0 | $ 26,986.1 | $ 25,843.7 | $ 25,285.9 | $ 26,986.1 | $ 25,285.9
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) | (32.9) | 23.4 | 22.3 | (6.8) | (9.5) | 15.5
Ending balance | 30,968.4 | 27,364.0 | 26,175.7 | 25,843.7 | 30,968.4 | 26,175.7
Total |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | 20.3 | (3.1) | (62.3) | (55.5) | (3.1) | (55.5)
Change in Fair Value Recognized in AOCI, Net of Tax | (36.0) |  | 13.9 |  | 1.2 | 31.8
Amount of (Gain) Loss Reclassified from AOCI | 3.9 |  | 10.6 |  | (13.6) | (20.7)
Income Tax (Expense) Benefit | 0.8 |  | 2.2 |  | (2.9) | (4.4)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | 3.1 |  | 8.4 |  | (10.7) | (16.3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) | (32.9) | 23.4 | 22.3 | (6.8) | (9.5) | 15.5
Ending balance | (12.6) | 20.3 | (40.0) | (62.3) | (12.6) | (40.0)
Pension and OPEB |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | (104.6) | (104.9) | (152.9) | (152.3) | (104.9) | (152.3)
Change in Fair Value Recognized in AOCI, Net of Tax | 0.0 |  | 0.0 |  | 0.0 | 0.0
Amount of (Gain) Loss Reclassified from AOCI | 0.3 |  | (0.1) |  | 0.7 | (0.9)
Income Tax (Expense) Benefit | 0.0 |  | 0.0 |  | 0.1 | (0.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | 0.3 |  | (0.1) |  | 0.6 | (0.7)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) | 0.3 |  | (0.1) |  | 0.6 | (0.7)
Ending balance | (104.3) | (104.6) | (153.0) | (152.9) | (104.3) | (153.0)
Amortization of Prior Service Cost (Credit) |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Amount of (Gain) Loss Reclassified from AOCI | (0.3) |  | (1.3) |  | (0.4) | (2.6)
Amortization of Actuarial (Gains) Losses |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Amount of (Gain) Loss Reclassified from AOCI | 0.6 |  | 1.2 |  | 1.1 | 1.7
Commodity | Cash Flow Hedges |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | 123.7 | 98.5 | 87.2 | 104.9 | 98.5 | 104.9
Change in Fair Value Recognized in AOCI, Net of Tax | (36.0) |  | 7.0 |  | 2.2 | 12.5
Amount of (Gain) Loss Reclassified from AOCI | 4.8 |  | 11.8 |  | (11.7) | (17.5)
Income Tax (Expense) Benefit | 1.0 |  | 2.3 |  | (2.5) | (3.8)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | 3.8 |  | 9.5 |  | (9.2) | (13.7)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) | (32.2) |  | 16.5 |  | (7.0) | (1.2)
Ending balance | 91.5 | 123.7 | 103.7 | 87.2 | 91.5 | 103.7
Commodity | Cash Flow Hedges | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Amount of (Gain) Loss Reclassified from AOCI | 4.8 |  | 11.8 |  | (11.7) | (17.5)
Interest Rate | Cash Flow Hedges |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | 1.2 | 3.3 | 3.4 | (8.1) | 3.3 | (8.1)
Change in Fair Value Recognized in AOCI, Net of Tax | 0.0 |  | 6.9 |  | (1.0) | 19.3
Amount of (Gain) Loss Reclassified from AOCI | (1.2) |  | (1.1) |  | (2.6) | (2.3)
Income Tax (Expense) Benefit | (0.2) |  | (0.1) |  | (0.5) | (0.4)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | (1.0) |  | (1.0) |  | (2.1) | (1.9)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) | (1.0) |  | 5.9 |  | (3.1) | 17.4
Ending balance | 0.2 | $ 1.2 | 9.3 | $ 3.4 | 0.2 | 9.3
Interest Rate | Cash Flow Hedges | Interest Expense |  |  |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |  |  |  |
Amount of (Gain) Loss Reclassified from AOCI | $ (1.2) |  | $ (1.1) |  | $ (2.6) | $ (2.3)

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