v3.26.1
Cover Statement
3 Months Ended
Mar. 31, 2026
Entity Information [Line Items]  
Document Fiscal Year Focus 2026
Document Fiscal Period Focus Q1
Entity Central Index Key 0000787250
Current Fiscal Year End Date --12-31
Amendment Flag false
Entity Current Reporting Status No
Document Type 10-Q
Document Quarterly Report true
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Shell Company false
Document Period End Date Mar. 31, 2026
Document Transition Report false
Entity Registrant Name DPL LLC
Entity Incorporation, State or Country Code OH
Entity File Number 1-9052
Entity Address, Address Line One 1065 Woodman Drive
Entity Address, Postal Zip Code 45432
Local Phone Number 259-7215
Entity Tax Identification Number 31-1163136
Entity Small Business false
Entity Emerging Growth Company false
Entity Address, City or Town Dayton
Entity Address, City or Town OH
City Area Code 937
Document Information [Line Items]  
Entity Current Reporting Status No