Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2023

Changes in Accumulated Other Comprehensive Income (Loss) by Component

	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 Benefit	(15.6)		(1.3)		(4.0)		(20.9)
Income Tax Benefit	(3.4)		(0.2)		(0.8)		(4.4)
Reclassifications from AOCI, Net of Income Tax 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
Three Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2022	$	533.6	$	(10.8)	$	28.6	$	551.4
Change in Fair Value Recognized in AOCI, Net of Tax	94.3		7.4		—		101.7
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(222.6)		—		—		(222.6)
Interest Expense (a)	—		0.9		—		0.9
Amortization of Prior Service Cost (Credit)	—		—		(6.2)		(6.2)
Amortization of Actuarial (Gains) Losses	—		—		2.2		2.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(222.4)		0.9		(4.0)		(225.5)
Income Tax (Expense) Benefit	(46.6)		0.1		(0.8)		(47.3)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(175.8)		0.8		(3.2)		(178.2)
Net Current Period Other Comprehensive Income (Loss)	(81.5)		8.2		(3.2)		(76.5)
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

	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	—		—		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)

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2021	$	163.7	$	(21.3)	$	42.4	$	184.8
Change in Fair Value Recognized in AOCI, Net of Tax	629.8		16.2		—		646.0
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(432.3)		—		—		(432.3)
Interest Expense (a)	—		3.1		—		3.1
Amortization of Prior Service Cost (Credit)	—		—		(16.5)		(16.5)
Amortization of Actuarial (Gains) Losses	—		—		6.4		6.4
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(432.1)		3.1		(10.1)		(439.1)
Income Tax (Expense) Benefit	(90.7)		0.6		(2.1)		(92.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(341.4)		2.5		(8.0)		(346.9)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI	—		—		(11.4)		(11.4)
Income Tax (Expense) Benefit	—		—		(2.4)		(2.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, Net of Income Tax (Expense) Benefit	—		—		(9.0)		(9.0)
Net Current Period Other Comprehensive Income (Loss)	288.4		18.7		(17.0)		290.1
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

(a)Amounts reclassified to the referenced line item on the statements of income.