XML 64 R47.htm IDEA: XBRL DOCUMENT v3.20.2
Debt (Narrative) (Details)
$ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
debt_covenant
fiscal_quarter
Jun. 30, 2019
USD ($)
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Jun. 01, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity $ 110.0          
Long-term Line of Credit 0.0         $ 104.0
Retirement of long-term debt $ 0.0 $ 978.0        
Debt Covenant, Leverage Ratio, Maximum 0.67          
Debt Covenant, Interest Coverage Ratio, Minimum 1.70       2.25  
Interest Coverage Ratio 2.75          
Line of Credit Facility, Current Borrowing Capacity         $ 125.0  
Proceeds from Issuance of Long-term Debt $ 415.0 821.7        
Debt Instrument, Debt Covenant, EBITDA to Interest Expense, EBITDA Minimum $ 125.0          
Debt Instrument, Debt Covenant, Total Debt to EBITDA Ratio 7.00          
Line of Credit Facility, quarterly borrowing limit reduction $ 5.0          
Line of Credit Facility, quarterly borrowing limit reduction 5.0          
Phase 1 [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Debt Covenant, EBITDA to Interest Expense, EBITDA Minimum 130.0          
Phase 2 [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Debt Covenant, EBITDA to Interest Expense, EBITDA Minimum 150.0          
Forecast [Member]            
Debt Instrument [Line Items]            
Debt Covenant, Interest Coverage Ratio, Minimum     2.00 1.75    
Debt Instrument, Debt Covenant, EBITDA to Interest Expense, EBITDA Minimum     $ 150.0 $ 130.0    
THE DAYTON POWER AND LIGHT COMPANY [Member]            
Debt Instrument [Line Items]            
Long-term Line of Credit 0.0         40.0
Retirement of long-term debt 0.0 436.1        
Proceeds from Issuance of Long-term Debt 0.0 $ 422.3        
3.95% Senior Notes due 2049 [Member] | THE DAYTON POWER AND LIGHT COMPANY [Member]            
Debt Instrument [Line Items]            
Long-term Debt, Gross $ 425.0         425.0
Variable Rate Notes Backed by Term Loan and First Mortgage Bonds [Member]            
Debt Instrument [Line Items]            
Debt instrument interest percentage 4.20%          
Variable Rate Notes Backed by Term Loan and First Mortgage Bonds [Member] | THE DAYTON POWER AND LIGHT COMPANY [Member]            
Debt Instrument [Line Items]            
Long-term Debt, Gross $ 140.0         140.0
DPL Revolving Credit Agreement and Term Loan Maturing July 2020 [Member]            
Debt Instrument [Line Items]            
Number of financial covenants | debt_covenant 2          
Number of prior quarters included in EBITDA to interest calculation | fiscal_quarter 4          
Debt Covenant, Interest Coverage Ratio, Minimum 2.50          
Ten Year Senior Unsecured Notes At725 Maturing At October152021 [Member]            
Debt Instrument [Line Items]            
Long-term Debt, Gross $ 380.0         $ 380.0
Debt instrument interest percentage 7.25%          
Make Whole Premium $ 30.8          
Revolving Credit Facility [Member] | THE DAYTON POWER AND LIGHT COMPANY [Member]            
Debt Instrument [Line Items]            
Debt Covenant, Total Debt to Total Capitalization Ratio, Maximum 0.67          
Total Debt to Total Capitalization Ratio 0.48          
4.125% Senior Notes due 2025 [Member]            
Debt Instrument [Line Items]            
Debt instrument interest percentage 4.125%          
Proceeds from Issuance of Long-term Debt $ 415.0          
3.25% First Mortgage Bonds due 2040 [Member] | THE DAYTON POWER AND LIGHT COMPANY [Member]            
Debt Instrument [Line Items]            
Long-term Debt, Gross $ 140.0          
Debt instrument interest percentage 320.00%          
Proceeds from Issuance of Long-term Debt $ 140.0