Annual report pursuant to Section 13 and 15(d)

Borrowings (6.375% Senior Notes) (Details)

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Borrowings (6.375% Senior Notes) (Details) - USD ($)
Jun. 07, 2018
Dec. 31, 2019
Dec. 31, 2018
6.375% Senior Notes due 2026      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated (as a percent)   6.375% 6.375%
Unsecured debt | Callon Petroleum Operating Company      
Debt Instrument [Line Items]      
Ownership percentage by parent   100.00%  
Unsecured debt | 6.375% Senior Notes due 2026      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated (as a percent) 6.375% 6.375%  
Debt instrument aggregate principal amount $ 400,000,000.0    
Net proceeds from issuance of senior unsecured notes $ 394,000,000.0    
Unsecured debt | 6.375% Senior Notes due 2026 | Change Of Control      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 101.00%    
Unsecured debt | 6.375% Senior Notes due 2026 | Prior to July 1, 2021, a Redemption of up to 35% of the Principal      
Debt Instrument [Line Items]      
Number of days to closing date of equity offerings 180 days    
Debt instrument redemption price percent (as a percent) 106.375%    
Unsecured debt | 6.375% Senior Notes due 2026 | Prior to July 1, 2021, a Redemption of up to 35% of the Principal | Maximum      
Debt Instrument [Line Items]      
Redemption principal amount percentage (as a percent) 35.00%    
Unsecured debt | 6.375% Senior Notes due 2026 | Prior to July 1, 2021, a Redemption of up to 35% of the Principal | Minimum      
Debt Instrument [Line Items]      
Redemption principal remaining amount percentage (as a percent) 65.00%    
Unsecured debt | 6.375% Senior Notes due 2026 | Prior to July 1, 2021, a Redemption of All or Part of the Principal      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 100.00%    
Unsecured debt | 6.375% Senior Notes due 2026 | On or After July 1, 2021, but Before July 1, 2022      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 103.188%    
Unsecured debt | 6.375% Senior Notes due 2026 | On or After July 1, 2022, but Before July 1, 2023      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 102.125%    
Unsecured debt | 6.375% Senior Notes due 2026 | On or After July 1, 2023, but Before July 1, 2024      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 101.063%    
Unsecured debt | 6.375% Senior Notes due 2026 | On or After July 1, 2024      
Debt Instrument [Line Items]      
Debt instrument redemption price percent (as a percent) 100.00%