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Business Segments
 6 Months Ended
Jun. 30, 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 June 30, 2025
Revenue from external customers$227.4 $2.5 $— $229.9 
Intersegment revenue0.2 1.2 (1.4)— 
Total revenue227.6 3.7 (1.4)229.9 
Operating costs and expenses
Net purchased power82.5 0.5 (0.2)82.8 
Operation and maintenance64.8 1.9 (1.2)65.5 
Depreciation and amortization29.0 0.6 — 29.6 
Taxes other than income taxes27.7 0.1 — 27.8 
Interest expense, net13.7 6.2 — 19.9 
Other segment items (a)
0.4 (1.4)— (1.0)
Income / (loss) before income tax9.5 (4.2)— 5.3 
Income tax expense / (benefit)4.0 (1.0)— 3.0 
Net income / (loss)$5.5 $(3.2)$— $2.3 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Capital expenditures
$72.2 $0.8 $— $73.0 
$ in millionsUtilityOtherAdjustments and EliminationsDPL Consolidated
Three Months Ended June 30, 2024
Revenue from external customers$206.7 2.5 $— $209.2 
Intersegment revenue0.2 1.3 (1.5)— 
Total revenue206.9 3.8 (1.5)209.2 
Operating costs and expenses
Net purchased power69.2 0.6 (0.3)69.5 
Operation and maintenance60.8 1.5 (1.2)61.1 
Depreciation and amortization20.7 0.4 — 21.1 
Taxes other than income taxes26.9 0.2 — 27.1 
Interest expense, net11.7 9.0 0.1 20.8 
Other segment items (a)
(1.3)(0.5)(0.1)(1.9)
Income / (loss) before income tax18.9 (7.4)— 11.5 
Income tax expense / (benefit)3.8 (2.5)— 1.3 
Net income / (loss)$15.1 $(4.9)$— $10.2 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Capital expenditures
$115.0 $(0.5)$— $114.5 
$ in millionsUtilityOtherAdjustments and EliminationsDPL Consolidated
Six months ended June 30, 2025
Revenue from external customers$479.2 $5.0 $— $484.2 
Intersegment revenue0.5 2.4 (2.9)— 
Total revenue479.7 7.4 (2.9)484.2 
Operating costs and expenses
Net purchased power177.3 1.1 (0.5)177.9 
Operation and maintenance128.7 4.7 (2.4)131.0 
Depreciation and amortization57.8 1.0 — 58.8 
Taxes other than income taxes63.9 0.2 — 64.1 
Interest expense, net28.4 15.4 — 43.8 
Other segment items (a)
1.7 (2.1)— (0.4)
Income / (loss) before income tax21.9 (12.9)— 9.0 
Income tax expense / (benefit)5.7 (1.7)— 4.0 
Net income / (loss)$16.2 $(11.2)$— $5.0 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Capital expenditures
$157.5 $0.8 $— $158.3 
$ in millionsUtilityOtherAdjustments and EliminationsDPL Consolidated
Six months ended June 30, 2024
Revenue from external customers$430.8 $4.8 $— $435.6 
Intersegment revenue0.4 2.5 (2.9)— 
Total revenue431.2 7.3 (2.9)435.6 
Operating costs and expenses
Net purchased power158.7 1.0 (0.5)159.2 
Operation and maintenance121.5 2.9 (2.4)122.0 
Depreciation and amortization42.8 0.9 — 43.7 
Taxes other than income taxes56.1 0.2 — 56.3 
Interest expense, net22.9 18.0 0.2 41.1 
Other segment items(a)
(1.4)(0.8)(0.2)(2.4)
Income / (loss) before income tax30.6 (14.9)— 15.7 
Income tax expense / (benefit)6.1 (3.2)— 2.9 
Net income / (loss)$24.5 $(11.7)$— $12.8 
(a) Other segment items primarily includes AFUDC equity and other miscellaneous gains and losses in Other income / (expense), net.
Capital expenditures
$288.1 $1.0 $— $289.1 
Total Assets ($ in millions)June 30, 2025December 31, 2024
Utility$3,462.6 $3,355.2 
All Other (a)
58.4 62.2 
DPL Consolidated$3,521.0 $3,417.4