XML 85 R45.htm IDEA: XBRL DOCUMENT v3.24.2
Comprehensive Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Changes in Accumulated Other Comprehensive Income (Loss) by Component            
Beginning Balance in AOCI $ (62.3) $ (55.5) $ (68.1) $ 83.7 $ (55.5) $ 83.7
Change in Fair Value Recognized in AOCI 13.9   12.9   31.8 (190.1)
Commodity            
Generation & Marketing Revenues 4,579.2   4,372.5   9,604.9 9,063.4
Interest Rate            
Interest Expense 465.6   460.0   901.2 875.7
Amortization Of Pension And Other Postretirement Benefit Plans            
Reclassification from AOCI, before Income Tax (Expense) Benefit 10.6   23.9   (20.7) 67.5
Income Tax (Expense) Benefit 6.7   28.6   (135.2) 39.0
Reclassification from AOCI, Net of Income Tax (Expense) Benefit 8.4   18.8   (16.3) 53.3
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax 0.0   0.0   0.0 16.7
Net Current Period Other Comprehensive Income (Loss) 22.3 (6.8) 31.7 (151.8) 15.5 (120.1)
Ending Balance in AOCI (40.0) (62.3) (36.4) (68.1) (40.0) (36.4)
Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI            
Amortization Of Pension And Other Postretirement Benefit Plans            
Income Tax (Expense) Benefit           4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit           21.1
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax           16.7
Cash Flow Hedges [Member] | Commodity [Member]            
Changes in Accumulated Other Comprehensive Income (Loss) by Component            
Beginning Balance in AOCI 87.2 104.9 65.3 223.5 104.9 223.5
Change in Fair Value Recognized in AOCI 7.0   5.9   12.5 (189.4)
Amortization Of Pension And Other Postretirement Benefit Plans            
Reclassification from AOCI, before Income Tax (Expense) Benefit 11.8   28.3   (17.5) 75.3
Reclassification from AOCI, Net of Income Tax (Expense) Benefit 9.5   22.3   (13.7) 59.4
Net Current Period Other Comprehensive Income (Loss) 16.5   28.2   (1.2) (130.0)
Ending Balance in AOCI 103.7 87.2 93.5 65.3 103.7 93.5
Cash Flow Hedges [Member] | Commodity [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI            
Amortization Of Pension And Other Postretirement Benefit Plans            
Income Tax (Expense) Benefit           0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit           0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax           0.0
Cash Flow Hedges [Member] | Interest Rate [Member]            
Changes in Accumulated Other Comprehensive Income (Loss) by Component            
Beginning Balance in AOCI 3.4 (8.1) 6.1 0.3 (8.1) 0.3
Change in Fair Value Recognized in AOCI 6.9   7.0   19.3 12.2
Amortization Of Pension And Other Postretirement Benefit Plans            
Reclassification from AOCI, before Income Tax (Expense) Benefit (1.1)   (0.5)   (2.3) 0.2
Reclassification from AOCI, Net of Income Tax (Expense) Benefit (1.0)   (0.4)   (1.9) 0.2
Net Current Period Other Comprehensive Income (Loss) 5.9   6.6   17.4 12.4
Ending Balance in AOCI 9.3 3.4 12.7 6.1 9.3 12.7
Cash Flow Hedges [Member] | Interest Rate [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI            
Amortization Of Pension And Other Postretirement Benefit Plans            
Income Tax (Expense) Benefit           0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit           0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax           0.0
Pension and OPEB [Member]            
Changes in Accumulated Other Comprehensive Income (Loss) by Component            
Beginning Balance in AOCI (152.9) (152.3) (139.5) (140.1) (152.3) (140.1)
Change in Fair Value Recognized in AOCI 0.0   0.0   0.0 (12.9)
Amortization Of Pension And Other Postretirement Benefit Plans            
Reclassification from AOCI, before Income Tax (Expense) Benefit (0.1)   (3.9)   (0.9) (8.0)
Reclassification from AOCI, Net of Income Tax (Expense) Benefit (0.1)   (3.1)   (0.7) (6.3)
Net Current Period Other Comprehensive Income (Loss) (0.1)   (3.1)   (0.7) (2.5)
Ending Balance in AOCI (153.0) $ (152.9) (142.6) $ (139.5) (153.0) (142.6)
Pension and OPEB [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI | Pension Costs            
Amortization Of Pension And Other Postretirement Benefit Plans            
Income Tax (Expense) Benefit           4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit           21.1
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax           16.7
Generation and Marketing [Member]            
Commodity            
Generation & Marketing Revenues 442.5   318.2   958.4 645.1
Reclassifications from Accumulated Other Comprehensive Income [Member]            
Interest Rate            
Interest Expense [1] (1.1)   (0.5)   (2.3) 0.2
Amortization Of Pension And Other Postretirement Benefit Plans            
Amortization of Prior Service Cost (Credit) (1.3)   (5.3)   (2.6) (10.6)
Amortization of Actuarial (Gains) Losses 1.2   1.4   1.7 2.6
Income Tax (Expense) Benefit 2.2   5.1   (4.4) 14.2
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Commodity [Member]            
Interest Rate            
Interest Expense [1] 0.0   0.0   0.0 0.0
Amortization Of Pension And Other Postretirement Benefit Plans            
Amortization of Prior Service Cost (Credit) 0.0   0.0   0.0 0.0
Amortization of Actuarial (Gains) Losses 0.0   0.0   0.0 0.0
Income Tax (Expense) Benefit 2.3   6.0   (3.8) 15.9
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]            
Interest Rate            
Interest Expense [1] (1.1)   (0.5)   (2.3) 0.2
Amortization Of Pension And Other Postretirement Benefit Plans            
Amortization of Prior Service Cost (Credit) 0.0   0.0   0.0 0.0
Amortization of Actuarial (Gains) Losses 0.0   0.0   0.0 0.0
Income Tax (Expense) Benefit (0.1)   (0.1)   (0.4) 0.0
Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]            
Interest Rate            
Interest Expense [1] 0.0   0.0   0.0 0.0
Amortization Of Pension And Other Postretirement Benefit Plans            
Amortization of Prior Service Cost (Credit) (1.3)   (5.3)   (2.6) (10.6)
Amortization of Actuarial (Gains) Losses 1.2   1.4   1.7 2.6
Income Tax (Expense) Benefit 0.0   (0.8)   (0.2) (1.7)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]            
Commodity            
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [1] 11.8   28.3   (17.5) 75.3
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Cash Flow Hedges [Member] | Commodity [Member]            
Commodity            
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [1] 11.8   28.3   (17.5) 75.3
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]            
Commodity            
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [1] 0.0   0.0   0.0 0.0
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Pension and OPEB [Member]            
Commodity            
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [1] $ 0.0   $ 0.0   $ 0.0 $ 0.0
[1] Amounts reclassified to the referenced line item on the statements of income.