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Debt - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Debt Instrument          
Proceeds from revolving credit facilities     $ 1,300,000,000 $ 50,000,000  
Repayment of revolving credit facilities     975,000,000 $ 50,000,000  
Noble Midstream Services Revolving Credit Facility          
Debt Instrument          
Available borrowing capacity $ 415,000,000   415,000,000   $ 555,000,000
Commercial Paper          
Debt Instrument          
Proceeds from revolving credit facilities   $ 1,000,000,000.0      
Repayment of revolving credit facilities 675,000,000        
Revolving credit facility outstanding amount 325,000,000   325,000,000    
Noble Midstream | Commercial Paper          
Debt Instrument          
Available borrowing capacity 3,700,000,000   3,700,000,000   $ 4,000,000,000.0
Revolving Credit Facility          
Debt Instrument          
Total borrowing capacity $ 4,000,000,000.0   $ 4,000,000,000.0