Changes in Accumulated Other Comprehensive Income (Loss) by Component |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Three Months Ended September 30, 2024 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of June 30, 2024 | | $ | 103.7 | | | $ | 9.3 | | | $ | (153.0) | | | $ | (40.0) | | Change in Fair Value Recognized in AOCI, Net of Tax | | (28.8) | | | (24.5) | | | — | | | (53.3) | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | 0.1 | | | — | | | — | | | 0.1 | | Interest Expense (a) | | — | | | 8.8 | | | — | | | 8.8 | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (1.4) | | | (1.4) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 0.7 | | | 0.7 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | 0.1 | | | 8.8 | | | (0.7) | | | 8.2 | | Income Tax (Expense) Benefit | | 0.1 | | | 1.8 | | | (0.1) | | | 1.8 | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | — | | | 7.0 | | | (0.6) | | | 6.4 | | Net Current Period Other Comprehensive Loss | | (28.8) | | | (17.5) | | | (0.6) | | | (46.9) | | Balance in AOCI as of September 30, 2024 | | $ | 74.9 | | | $ | (8.2) | | | $ | (153.6) | | | $ | (86.9) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Three Months Ended September 30, 2023 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of June 30, 2023 | | $ | 93.5 | | | $ | 12.7 | | | $ | (142.6) | | | $ | (36.4) | | Change in Fair Value Recognized in AOCI, Net of Tax | | 19.3 | | | (6.9) | | | — | | | 12.4 | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | (15.6) | | | — | | | — | | | (15.6) | | Interest Expense (a) | | — | | | (1.3) | | | — | | | (1.3) | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (5.3) | | | (5.3) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 1.3 | | | 1.3 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | (15.6) | | | (1.3) | | | (4.0) | | | (20.9) | | Income Tax (Expense) Benefit | | (3.4) | | | (0.2) | | | (0.8) | | | (4.4) | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | (12.2) | | | (1.1) | | | (3.2) | | | (16.5) | | Net Current Period Other Comprehensive Income (Loss) | | 7.1 | | | (8.0) | | | (3.2) | | | (4.1) | | Balance in AOCI as of September 30, 2023 | | $ | 100.6 | | | $ | 4.7 | | | $ | (145.8) | | | $ | (40.5) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Nine Months Ended September 30, 2024 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of December 31, 2023 | | $ | 104.9 | | | $ | (8.1) | | | $ | (152.3) | | | $ | (55.5) | | Change in Fair Value Recognized in AOCI, Net of Tax | | (16.3) | | | (5.2) | | | — | | | (21.5) | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | (17.4) | | | — | | | — | | | (17.4) | | Interest Expense (a) | | — | | | 6.5 | | | — | | | 6.5 | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (4.0) | | | (4.0) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 2.4 | | | 2.4 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | (17.4) | | | 6.5 | | | (1.6) | | | (12.5) | | Income Tax (Expense) Benefit | | (3.7) | | | 1.4 | | | (0.3) | | | (2.6) | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | (13.7) | | | 5.1 | | | (1.3) | | | (9.9) | | Net Current Period Other Comprehensive Loss | | (30.0) | | | (0.1) | | | (1.3) | | | (31.4) | | Balance in AOCI as of September 30, 2024 | | $ | 74.9 | | | $ | (8.2) | | | $ | (153.6) | | | $ | (86.9) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Nine Months Ended September 30, 2023 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of December 31, 2022 | | $ | 223.5 | | | $ | 0.3 | | | $ | (140.1) | | | $ | 83.7 | | Change in Fair Value Recognized in AOCI, Net of Tax | | (170.1) | | | 5.3 | | | (12.9) | | | (177.7) | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | 59.7 | | | — | | | — | | | 59.7 | | Interest Expense (a) | | — | | | (1.1) | | | — | | | (1.1) | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (15.9) | | | (15.9) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 3.9 | | | 3.9 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | 59.7 | | | (1.1) | | | (12.0) | | | 46.6 | | Income Tax (Expense) Benefit | | 12.5 | | | (0.2) | | | (2.5) | | | 9.8 | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | 47.2 | | | (0.9) | | | (9.5) | | | 36.8 | | Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit | | — | | | — | | | 21.1 | | | 21.1 | | Income Tax (Expense) Benefit | | — | | | — | | | 4.4 | | | 4.4 | | Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, Net of Income Tax (Expense) Benefit | | — | | | — | | | 16.7 | | | 16.7 | | Net Current Period Other Comprehensive Income (Loss) | | (122.9) | | | 4.4 | | | (5.7) | | | (124.2) | | Balance in AOCI as of September 30, 2023 | | $ | 100.6 | | | $ | 4.7 | | | $ | (145.8) | | | $ | (40.5) | |
(a)Amounts reclassified to the referenced line item on the statements of income.
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