Fair Value (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value and Cost Of Non-Derivative Instruments

The following table presents the fair value, carrying value and cost of our non-derivative instruments as of March 31, 2022 and December 31, 2021.

	March 31, 2022				December 31, 2021
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.4	$	0.4	$	0.4	$	0.4
Equity securities	1.9		4.5		1.9		5.1
Debt securities	3.7		3.5		3.8		3.9
Total	$	6.0	$	8.4	$	6.1	$	9.4
	Carrying Value		Fair Value		Carrying Value		Fair Value
Liabilities
Long-term debt	$	1,396.0	$	1,403.7	$	1,395.5	$	1,519.7

Fair Value of Assets and Liabilities Measured on Recurring Basis

The fair value of assets and liabilities as of March 31, 2022 and December 31, 2021 and the respective category within the fair value hierarchy for DPL is as follows:

$ in millions	Fair value as of March 31, 2022 (a)								Fair value as of December 31, 2021 (a)
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Master Trust assets
Money market funds	$	0.4	$	—	$	—	$	0.4	$	0.4	$	—	$	—	$	0.4
Equity securities	—		4.5		—		4.5		—		5.1		—		5.1
Debt securities	—		3.5		—		3.5		—		3.9		—		3.9
Total assets	$	0.4	$	8.0	$	—	$	8.4	$	0.4	$	9.0	$	—	$	9.4
Liabilities
Long-term debt	$	—	$	1,386.6	$	17.1	$	1,403.7	$	—	$	1,502.5	$	17.2	$	1,519.7
Total Liabilities	$	—	$	1,386.6	$	17.1	$	1,403.7	$	—	$	1,502.5	$	17.2	$	1,519.7

(a)    Includes credit valuation adjustment

Subsidiaries [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value and Cost Of Non-Derivative Instruments

The following table presents the fair value, carrying value and cost of our non-derivative instruments as of March 31, 2022 and December 31, 2021.

	March 31, 2022				December 31, 2021
$ in millions	Cost		Fair Value		Cost		Fair Value
Assets
Money market funds	$	0.4	$	0.4	$	0.4	$	0.4
Equity securities	1.9		4.5		1.9		5.1
Debt securities	3.7		3.5		3.8		3.9
Total	$	6.0	$	8.4	$	6.1	$	9.4
	Carrying Value		Fair Value		Carrying Value		Fair Value
Liabilities
Long-term debt	$	574.3	$	582.8	$	574.3	$	642.6

Fair Value of Assets and Liabilities Measured on Recurring Basis

The fair value of assets and liabilities as of March 31, 2022 and December 31, 2021 and the respective category within the fair value hierarchy for AES Ohio is as follows:

$ in millions	Fair value as of March 31, 2022 (a)								Fair value as of December 31, 2021 (a)
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets
Master Trust assets
Money market funds	$	0.4	$	—	$	—	$	0.4	$	0.4	$	—	$	—	$	0.4
Equity securities	—		4.5		—		4.5		—		5.1		—		5.1
Debt securities	—		3.5		—		3.5		—		3.9		—		3.9
Total assets	$	0.4	$	8.0	$	—	$	8.4	$	0.4	$	9.0	$	—	$	9.4
Liabilities
Long-term debt	$	—	$	565.7	$	17.1	$	582.8	$	—	$	625.4	$	17.2	$	642.6
Total Liabilities	$	—	$	565.7	$	17.1	$	582.8	$	—	$	625.4	$	17.2	$	642.6

(a)    Includes credit valuation adjustment