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Debt and Credit Agreements - Narrative (Details)
Oct. 07, 2021
USD ($)
Sep. 16, 2021
Sep. 30, 2021
USD ($)
Apr. 21, 2021
USD ($)
Senior Notes | Subsequent event        
Debt Instrument [Line Items]        
Principal amount $ 1,800,000,000      
Cash Consideration 1,800,000      
Senior Notes | Subsequent event | Cimarex        
Debt Instrument [Line Items]        
Principal amount $ 1,800,000,000      
Revolving credit facility        
Debt Instrument [Line Items]        
Borrowing base       $ 3,200,000,000
Remaining borrowing capacity     $ 1,500,000,000 $ 1,500,000,000
Long-term debt     $ 0  
Revolving credit facility | Revolving credit facility        
Debt Instrument [Line Items]        
Total debt ratio   3.0