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Derivative and Hedging Activities - Narrative (Details)
€ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
day
counterparty
derivative
Dec. 31, 2018
USD ($)
day
derivative
$ / BTU
Dec. 31, 2017
USD ($)
$ / €
Dec. 31, 2017
EUR (€)
$ / €
Derivative [Line Items]        
Consecutive trading days | day 5      
Cash collateral for borrowed securities $ 0 $ 0    
Gain (loss) included in accumulated other comprehensive income to net income (loss) during the next 12 months $ (33,000,000)      
Cross currency interest rate contract | 6.25% euro-denominated senior notes due 2017 | Senior notes        
Derivative [Line Items]        
Interest rate, stated percentage     6.25% 6.25%
Semi annual interest rate swap payments by counterparty | €       € 246
Semi annual interest rate swap payments by Chesapeake     $ 327,000,000  
Exchange rate (in usd per euro) | $ / €     1.3325 1.3325
Credit risk        
Derivative [Line Items]        
Number of counterparties in hedge facility | counterparty 10      
Utica shale | Disposal group, disposed of by sale, not discontinued operations        
Derivative [Line Items]        
Consideration received $ 1,868,000,000      
Utica shale | Disposal group, disposed of by sale, not discontinued operations | Future natural gas prices        
Derivative [Line Items]        
Consideration received   $ 100,000,000    
Period of trading days | day   20    
Consecutive trading days | day   30    
2022 NYMEX natural gas | Utica shale | Disposal group, disposed of by sale, not discontinued operations | Future natural gas prices        
Derivative [Line Items]        
Consideration received   $ 50,000,000    
2022 NYMEX natural gas | Utica shale | Disposal group, disposed of by sale, not discontinued operations | Future natural gas prices 2022        
Derivative [Line Items]        
Average sales price (in usd per unit) | $ / BTU   3.00    
2022 NYMEX natural gas | Utica shale | Disposal group, disposed of by sale, not discontinued operations | Future natural gas prices 2023        
Derivative [Line Items]        
Average sales price (in usd per unit) | $ / BTU   3.25    
Designated as hedging instrument        
Derivative [Line Items]        
Number of derivative instruments | derivative 0 0