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Long-Term Debt - Debt Issuance, Repurchases, Repayments and Exchanges (Details) | 9 Months Ended
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Sep. 30, 2020 USD ($)
Long-term Debt Rollforward [Roll Forward] |
Total borrowings at face value as of December 31, 2019 | $ 37,401,000,000
Total borrowings at face value as of September 30, 2020 | 37,511,000,000
Variable rate bonds due February 2021 | July Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Tender and purchase | (473,000,000)
Variable rate bonds due February 2021 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Tender and purchase | (122,000,000)
Variable rate bonds due August 2022 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Tender and purchase | $ (448,000,000)
6.500% note payable to WES due 2038 | August Exchange | WES |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 6.50%
Tender and purchase | $ (260,000,000)
2-year variable rate Term Loan due 2021 | September Repayment |
Long-term Debt Rollforward [Roll Forward] |
Tender and purchase | $ (500,000,000)
Senior Notes | 8.000% senior notes due 2025 | Issuance of July 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 8.00%
Issuances | $ 500,000,000
Senior Notes | 8.500% senior notes due 2027 | Issuance of July 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 8.50%
Issuances | $ 500,000,000
Senior Notes | 8.875% senior notes due 2030 | Issuance of July 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 8.875%
Issuances | $ 1,000,000,000
Senior Notes | 4.100% senior notes due February 2021 | July Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 4.10%
Tender and purchase | $ (943,000,000)
Senior Notes | 4.100% senior notes due February 2021 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 4.10%
Tender and purchase | $ (139,000,000)
Senior Notes | 4.850% senior notes due March 2021 | July Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 4.85%
Tender and purchase | $ (530,000,000)
Senior Notes | 2.600% senior notes due August 2021 | July Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 2.60%
Tender and purchase | $ (51,000,000)
Senior Notes | 2.600% senior notes due August 2021 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 2.60%
Tender and purchase | $ (1,099,000,000)
Senior Notes | 5.875% senior notes due 2025 | Issuance of August 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 5.875%
Issuances | $ 900,000,000
Senior Notes | 6.375% senior notes due 2028 | Issuance of August 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 6.375%
Issuances | $ 600,000,000
Senior Notes | 6.625% senior notes due 2030 | Issuance of August 2020 Notes |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 6.625%
Issuances | $ 1,500,000,000
Senior Notes | 2.600% senior Notes due April 2022 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 2.60%
Tender and purchase | $ (171,000,000)
Senior Notes | 2.700% senior Notes due August 2022 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 2.70%
Tender and purchase | $ (102,000,000)
Senior Notes | 2.700% senior Notes due February 2023 | August and September Tender and Purchase |
Long-term Debt Rollforward [Roll Forward] |
Interest rate | 2.70%
Tender and purchase | $ (52,000,000)

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