Changes in Accumulated Other Comprehensive Income (Loss) by Component |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Three Months Ended June 30, 2024 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of March 31, 2024 | | $ | 87.2 | | | $ | 3.4 | | | $ | (152.9) | | | $ | (62.3) | | Change in Fair Value Recognized in AOCI, Net of Tax | | 7.0 | | | 6.9 | | | — | | | 13.9 | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | 11.8 | | | — | | | — | | | 11.8 | | Interest Expense (a) | | — | | | (1.1) | | | — | | | (1.1) | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (1.3) | | | (1.3) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 1.2 | | | 1.2 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | 11.8 | | | (1.1) | | | (0.1) | | | 10.6 | | Income Tax (Expense) Benefit | | 2.3 | | | (0.1) | | | — | | | 2.2 | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | 9.5 | | | (1.0) | | | (0.1) | | | 8.4 | | Net Current Period Other Comprehensive Income (Loss) | | 16.5 | | | 5.9 | | | (0.1) | | | 22.3 | | Balance in AOCI as of June 30, 2024 | | $ | 103.7 | | | $ | 9.3 | | | $ | (153.0) | | | $ | (40.0) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Three Months Ended June 30, 2023 | | Commodity | | Interest Rate | | and OPEB | | Total | | | (in millions) | Balance in AOCI as of March 31, 2023 | | $ | 65.3 | | | $ | 6.1 | | | $ | (139.5) | | | $ | (68.1) | | Change in Fair Value Recognized in AOCI, Net of Tax | | 5.9 | | | 7.0 | | | — | | | 12.9 | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | 28.3 | | | — | | | — | | | 28.3 | | Interest Expense (a) | | — | | | (0.5) | | | — | | | (0.5) | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (5.3) | | | (5.3) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 1.4 | | | 1.4 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | 28.3 | | | (0.5) | | | (3.9) | | | 23.9 | | Income Tax (Expense) Benefit | | 6.0 | | | (0.1) | | | (0.8) | | | 5.1 | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | 22.3 | | | (0.4) | | | (3.1) | | | 18.8 | | Net Current Period Other Comprehensive Income (Loss) | | 28.2 | | | 6.6 | | | (3.1) | | | 31.7 | | Balance in AOCI as of June 30, 2023 | | $ | 93.5 | | | $ | 12.7 | | | $ | (142.6) | | | $ | (36.4) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Six Months Ended June 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 | | 12.5 | | | 19.3 | | | — | | | 31.8 | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | (17.5) | | | — | | | — | | | (17.5) | | Interest Expense (a) | | — | | | (2.3) | | | — | | | (2.3) | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (2.6) | | | (2.6) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 1.7 | | | 1.7 | | Reclassifications from AOCI, before Income Tax Expense | | (17.5) | | | (2.3) | | | (0.9) | | | (20.7) | | Income Tax Expense | | (3.8) | | | (0.4) | | | (0.2) | | | (4.4) | | Reclassifications from AOCI, Net of Income Tax Expense | | (13.7) | | | (1.9) | | | (0.7) | | | (16.3) | | Net Current Period Other Comprehensive Income (Loss) | | (1.2) | | | 17.4 | | | (0.7) | | | 15.5 | | Balance in AOCI as of June 30, 2024 | | $ | 103.7 | | | $ | 9.3 | | | $ | (153.0) | | | $ | (40.0) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash Flow Hedges | | Pension | | | Six Months Ended June 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 | | (189.4) | | | 12.2 | | | (12.9) | | | (190.1) | | Amount of (Gain) Loss Reclassified from AOCI | | | | | | | | | | | | | | | | | | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a) | | 75.3 | | | — | | | — | | | 75.3 | | Interest Expense (a) | | — | | | 0.2 | | | — | | | 0.2 | | Amortization of Prior Service Cost (Credit) | | — | | | — | | | (10.6) | | | (10.6) | | Amortization of Actuarial (Gains) Losses | | — | | | — | | | 2.6 | | | 2.6 | | Reclassifications from AOCI, before Income Tax (Expense) Benefit | | 75.3 | | | 0.2 | | | (8.0) | | | 67.5 | | Income Tax (Expense) Benefit | | 15.9 | | | — | | | (1.7) | | | 14.2 | | Reclassifications from AOCI, Net of Income Tax (Expense) Benefit | | 59.4 | | | 0.2 | | | (6.3) | | | 53.3 | | Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax Benefit | | — | | | — | | | 21.1 | | | 21.1 | | Income Tax Benefit | | — | | | — | | | 4.4 | | | 4.4 | | Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, Net of Income Tax Benefit | | — | | | — | | | 16.7 | | | 16.7 | | Net Current Period Other Comprehensive Income (Loss) | | (130.0) | | | 12.4 | | | (2.5) | | | (120.1) | | Balance in AOCI as of June 30, 2023 | | $ | 93.5 | | | $ | 12.7 | | | $ | (142.6) | | | $ | (36.4) | |
(a)Amounts reclassified to the referenced line item on the statements of income.
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