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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2020
Income Taxes [Line Items]  
Components of Income Tax Expense
DPL’s components of income tax expense for both continuing and discontinued operations were as follows:
Years ended December 31,
$ in millions202020192018
Components of tax expense / (benefit)
Federal - current$(45.1)$(22.0)$40.0 
State and Local - current(0.1)0.6 0.4 
Total current(45.2)(21.4)40.4 
Federal - deferred38.7 14.1 (9.6)
State and local - deferred1.1 1.1 (0.1)
Total deferred39.8 15.2 (9.7)
Tax expense / (benefit)$(5.4)$(6.2)$30.7 
Schedule of Effective Income Tax Rate Reconciliation
The following table summarizes a reconciliation of the U.S. statutory federal income tax rate to DPL's effective tax rate, as a percentage of total income before taxes for the years ended December 31, 2020, 2019 and 2018:
Years ended December 31,
202020192018
Statutory Federal tax rate21.0 %21.0 %21.0 %
State taxes, net of Federal tax benefit(13.1)%1.4 %0.1 %
AFUDC - equity(23.6)%(0.1)%(0.1)%
Depreciation of flow-through differences94.8 %(28.2)%(4.6)%
Amortization of investment tax credits4.1 %(0.3)%(0.3)%
Deferred tax adjustments— %— %15.5 %
Permanent differences— %— %0.1 %
Other, net1.2 %(0.1)%(1.2)%
Effective tax rate84.4 %(6.3)%30.5 %
Components of Deferred Tax Assets and Liabilities
The components of our deferred taxes are as follows:
December 31,
$ in millions20202019
Net non-current assets / (liabilities)
Depreciation / property basis$(160.5)$(118.3)
Income taxes recoverable14.4 17.1 
Regulatory assets(21.0)(24.8)
Investment tax credit0.6 0.6 
Compensation and employee benefits(1.7)2.2 
Intangibles(0.4)(0.4)
Long-term debt(1.3)(2.1)
Other (a)
(7.3)(8.0)
Net non-current liabilities$(177.2)$(133.7)

(a)    The Other caption includes deferred tax assets of $39.0 million in 2020 and $29.0 million in 2019 related to state and local tax net operating loss carryforwards, with related valuation allowances of $39.0 million in 2020 and $29.0 million in 2019. These net operating loss carryforwards expire from 2020 to 2037.
Schedule of Tax Expense Benefit That Were Credited To Accumulated Other Comprehensive Loss (Text Block)
The following table presents the tax expense / (benefit) related to pensions, postemployment benefits, cash flow hedges and financial instruments that were credited to Accumulated other comprehensive loss.
Years ended December 31,
$ in millions202020192018
Tax expense / (benefit)$(2.6)$(0.5)$0.2 
THE DAYTON POWER AND LIGHT COMPANY [Member]  
Income Taxes [Line Items]  
Components of Income Tax Expense
DP&L’s components of income tax expense were as follows:
Years ended December 31,
$ in millions202020192018
Components of tax expense / (benefit)
Federal - current$3.5 $8.6 $1.4 
State and Local - current0.1 0.6 — 
Total current3.6 9.2 1.4 
Federal - deferred2.4 (10.9)15.5 
State and local - deferred1.0 1.1 0.8 
Total deferred3.4 (9.8)16.3 
Tax expense / (benefit)$7.0 $(0.6)$17.7 
Schedule of Effective Income Tax Rate Reconciliation
The following table summarizes a reconciliation of the U.S. statutory federal income tax rate to DP&L's effective tax rate, as a percentage of income before taxes for the years ended December 31, 2020, 2019 and 2018:
Years ended December 31,
202020192018
Statutory Federal tax rate21.0 %21.0 %21.0 %
State taxes, net of Federal tax benefit1.5 %1.3 %0.6 %
AFUDC - Equity2.6 %(0.1)%(0.1)%
Amortization of investment tax credits(0.5)%(0.2)%(0.3)%
Depreciation of flow-through differences(10.6)%(22.6)%(4.0)%
Change in tax reserves(6.1)%— %— %
Other - net4.1 %0.1 %(0.2)%
Effective tax rate12.0 %(0.5)%17.0 %
Components of Deferred Tax Assets and Liabilities
December 31,
$ in millions20202019
Net non-current assets / (liabilities)
Depreciation / property basis$(161.7)$(141.5)
Income taxes recoverable14.4 17.1 
Regulatory assets(21.7)(25.6)
Investment tax credit0.5 0.5 
Compensation and employee benefits(0.1)3.1 
Other
(3.5)(11.7)
Net non-current liabilities$(172.1)$(158.1)
Reconciliation of Unrecognized Tax Benefits .