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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment PROPERTY, PLANT AND EQUIPMENT
The following is a summary of DPL’s Property, plant and equipment with corresponding composite depreciation rates at December 31, 2023 and 2022:
December 31, 2023December 31, 2022
$ in millionsComposite RateComposite Rate
Regulated:
Transmission$505.3 2.5%$399.2 2.4%
Distribution1,860.9 3.5%1,658.9 3.7%
General19.3 5.9%20.7 5.2%
Non-depreciable99.5 N/A79.4 N/A
Total regulated2,485.0 2,158.2 
Unregulated:
Other31.3 4.1%30.6 3.7%
Non-depreciable5.6 N/A4.8 N/A
Total unregulated36.9 35.4 
Total property, plant and equipment in service$2,521.9 3.2%$2,193.6 3.3%
THE DAYTON POWER AND LIGHT COMPANY [Member]  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment PROPERTY, PLANT AND EQUIPMENT
The following is a summary of AES Ohio’s Property, plant and equipment with corresponding composite depreciation rates at December 31, 2023 and 2022:
December 31, 2023December 31, 2022
$ in millionsComposite RateComposite Rate
Regulated:
Transmission$648.0 2.0%$545.3 2.0%
Distribution2,283.4 2.9%2,093.8 3.1%
General32.2 3.5%34.2 4.0%
Non-depreciable99.6 N/A79.4 N/A
Total property, plant and equipment in service$3,063.2 2.6%$2,752.7 2.8%