v3.26.1
Cover Page
Jul. 23, 2026
Entity Information [Line Items]  
Document Type 8-K
Entity Emerging Growth Company false
Document Period End Date Jul. 23, 2026
Entity Registrant Name THE DAYTON POWER AND LIGHT COMPANY
Entity Incorporation, State or Country Code OH
Entity File Number 1-2385
Entity Tax Identification Number 31-0258470
Entity Address, Address Line One 1065 Woodman Drive
Entity Address, City or Town Dayton
Entity Address, State or Province OH
Entity Address, Postal Zip Code 45432
Local Phone Number 259-7215
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Central Index Key 0000027430
Amendment Flag false
City Area Code 937