Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Instrument [Line Items]

Long-term Debt

$ in millions	Interest Rate	Maturity	December 31, 2022		December 31, 2021
AES Ohio debt
First Mortgage Bonds	3.95%	2049	$	425.0	$	425.0
First Mortgage Bonds	3.20%	2040	140.0		140.0
Tax-exempt First Mortgage Bonds (a)	4.25%	2027	100.0		—
Tax-exempt First Mortgage Bonds (b)	4.00%	2027	40.0		—
U.S. Government note	4.20%	2061	17.0		17.2
Unamortized deferred financing costs			(6.9)		(5.4)
Unamortized debt discounts and premiums, net			(2.4)		(2.5)
Total long-term debt at AES Ohio			712.7		574.3
Senior unsecured bonds	4.125%	2025	415.0		415.0
Senior unsecured bonds	4.35%	2029	400.0		400.0
Note to DPL Capital Trust II (c)	8.125%	2031	15.6		15.6
Unamortized deferred financing costs			(6.7)		(8.6)
Unamortized debt discounts and premiums, net			(0.7)		(0.8)
Total long-term debt			1,535.9		1,395.5
Less: current portion			(0.2)		(0.2)
Long-term debt, net of current portion			$	1,535.7	$	1,395.3

(a)First mortgage bonds issued to the OAQDA, to secure the loan of proceeds from tax-exempt bonds issued by the OAQDA. The bonds have a final maturity date of November 1, 2040 but are subject to a mandatory put in June 2027.

(b)First mortgage bonds issued to the OAQDA, to secure the loan of proceeds from tax-exempt bonds issued by the OAQDA. The bonds have a final maturity date of January 1, 2034 but are subject to a mandatory put in June 2027.

(c)    Note payable to related party. See Note 11 – RELATED PARTY TRANSACTIONS for additional information.

Long-term Debt Maturities

At December 31, 2022, maturities of long-term debt are summarized as follows:

Due during the years ending December 31,
$ in millions
2023	$	0.2
2024	0.2
2025	415.2
2026	0.2
2027	140.2
Thereafter	996.6
	1,552.6
Unamortized discounts	(3.1)
Deferred financing costs, net	(13.6)
Total long-term debt	$	1,535.9

THE DAYTON POWER AND LIGHT COMPANY [Member]

Debt Instrument [Line Items]

Long-term Debt

$ in millions	Interest Rate	Maturity	December 31, 2022		December 31, 2021
First Mortgage Bonds	3.95%	2049	$	425.0	$	425.0
First Mortgage Bonds	3.20%	2040	140.0		140.0
Tax-exempt First Mortgage Bonds (a)	4.25%	2027	100.0		—
Tax-exempt First Mortgage Bonds (b)	4.00%	2027	40.0		—
U.S. Government note	4.20%	2061	17.0		17.2
Unamortized deferred financing costs			(6.9)		(5.4)
Unamortized debt discount			(2.4)		(2.5)
Total long-term debt			712.7		574.3
Less: current portion			(0.2)		(0.2)
Long-term debt, net of current portion			$	712.5	$	574.1

(a)First mortgage bonds issued to the OAQDA, to secure the loan of proceeds from tax-exempt bonds issued by the OAQDA. The bonds have a final maturity date of November 1, 2040 but are subject to a mandatory put in June 2027.

(b)First mortgage bonds issued to the OAQDA, to secure the loan of proceeds from tax-exempt bonds issued by the OAQDA. The bonds have a final maturity date of January 1, 2034 but are subject to a mandatory put in June 2027.

Revolving Credit Agreement

AES Ohio entered into a second amendment and restatement of the AES Ohio Credit Agreement on December 22, 2022 with a syndication of bank lenders. The AES Ohio Credit Agreement is an unsecured committed line of credit to be used: (i) to finance capital expenditures; (ii) to refinance certain existing indebtedness, (iii) to support working capital; and (iv) for general corporate purposes. This agreement matures on December 22, 2027, and bears interest

at variable rates as described in the agreement. It includes an uncommitted $100.0 million accordion feature to provide AES Ohio with an option to request an increase in the size of the facility, subject to approval by the lenders. The AES Ohio Credit Agreement also includes two one-year extension options, allowing AES Ohio to extend the maturity date subject to approval by the lenders. At December 31, 2022 and 2021 the AES Ohio Credit Agreement had outstanding borrowings of $120.0 million and $0.0 million, respectively.

Long-term Debt Maturities

At December 31, 2022, maturities of long-term debt are summarized as follows:

Due during the years ending December 31,
$ in millions
2023	$	0.2
2024	0.2
2025	0.2
2026	0.2
2027	140.2
Thereafter	581.0
	722.0
Unamortized discounts	(6.9)
Deferred financing costs, net	(2.4)
Total long-term debt	$	712.7