XML 90 R73.htm IDEA: XBRL DOCUMENT v3.6.0.2
Income Taxes (Effective and Statutory Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Entity Information [Line Items]      
Statutory Federal tax rate 35.00% 35.00% 35.00%
State taxes, net of Federal tax benefit 0.10% 0.10% 1.10%
AFUDC - Equity (0.30%) 1.50% (4.70%)
Amortization of investment tax credits 0.00% 0.20% (0.70%)
Section 199 - domestic production deduction 0.60% 1.80% (1.60%)
Non-deductible goodwill impairment 0.00% (48.00%) 0.00%
Other, net (0.30%) 0.80% (7.90%)
Effective tax rate 35.10% (8.60%) 21.20%
THE DAYTON POWER AND LIGHT COMPANY [Member]      
Entity Information [Line Items]      
Statutory Federal tax rate 35.00% 35.00% 35.00%
State taxes, net of Federal tax benefit 0.40% 0.30% 0.80%
AFUDC - Equity (0.30%) (2.00%) (1.70%)
Amortization of investment tax credits 0.20% (1.70%) (1.60%)
Section 199 - domestic production deduction 0.40% (4.30%) (3.00%)
Other, net (0.40%) (2.50%) (3.80%)
Effective tax rate 35.30% 24.80% 25.70%