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Business Segments
 3 Months Ended
Mar. 31, 2025
Segment Reporting Information [Line Items]  
Business Segments BUSINESS SEGMENTS
DPL manages its business through one reportable operating segment, the Utility segment, led by our Chief Executive Officer and Chief Financial Officer who, collectively, are the Chief Operating Decision Maker. The primary segment performance measures are income / (loss) before income tax and net income / (loss) as management has concluded that these measures best reflect the underlying business performance of DPL and are the most relevant measures considered in DPL’s internal evaluation of the financial performance of its segment. The Utility segment is comprised of AES Ohio, a public electric transmission and distribution utility, with all other nonutility business activities aggregated separately. See Note 1. Overview and Summary of Significant Accounting Policies for further information on AES Ohio. The “Other” nonutility category primarily includes interest expense, cash and other immaterial balances. The accounting policies of the identified segment are consistent with those policies and procedures described in the summary of significant accounting policies.

The following tables present financial information for DPL’s reportable business segment:
$ in millionsUtilityOtherAdjustments and EliminationsDPL Consolidated
Three months ended March 31, 2025
Revenue from external customers$251.8 $2.5 $— $254.3 
Intersegment revenue0.3 1.2 (1.5)— 
Total revenue252.1 3.7 (1.5)254.3 
Operating costs and expenses
Net purchased power94.8 0.6 (0.3)95.1 
Operation and maintenance63.9 2.8 (1.2)65.5 
Depreciation and amortization28.8 0.4 — 29.2 
Taxes other than income taxes36.2 0.1 — 36.3 
Interest expense, net14.7 9.2 — 23.9 
Other segment items (a)
1.3 (0.7)— 0.6 
Income / (loss) before income tax12.4 (8.7)— 3.7 
Income tax expense / (benefit)1.7 (0.7)— 1.0 
Net income / (loss)$10.7 $(8.0)$— $2.7 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Cash capital expenditures$85.3 $— $— $85.3 
$ in millionsUtilityOtherAdjustments and EliminationsDPL Consolidated
Three months ended March 31, 2024
Revenue from external customers$224.1 $2.3 $— $226.4 
Intersegment revenue0.2 1.2 (1.4)— 
Total revenue224.3 3.5 (1.4)226.4 
Operating costs and expenses
Net purchased power89.5 0.4 (0.2)89.7 
Operation and maintenance60.7 1.4 (1.2)60.9 
Depreciation and amortization22.1 0.5 — 22.6 
Taxes other than income taxes29.2 — — 29.2 
Interest expense, net11.2 9.0 0.1 20.3 
Other segment items(a)
(0.1)(0.3)(0.1)(0.5)
Income / (loss) before income tax11.7 (7.5)— 4.2 
Income tax expense / (benefit)2.3 (0.7)— 1.6 
Net income / (loss)$9.4 $(6.8)$— $2.6 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Cash capital expenditures$173.1 $1.5 $— $174.6 
Total Assets ($ in millions)March 31, 2025December 31, 2024
Utility$3,432.6 $3,355.2 
All Other (a)
56.8 62.2 
DPL Consolidated$3,489.4 $3,417.4