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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 |  |

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