Sales and Other Operating Revenues - Receivables and Contract Liabilities (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2021 |
Dec. 31, 2020 |
|
| Accounts Receivable, Net | $ 4,262,000,000 | $ 4,262,000,000 | $ 1,827,000,000 |
| Revenue, Performance Obligation, Description of Timing | We typically receive payment within 30 days or less (depending on the terms of the invoice) once delivery is made. | ||
| Contract with Customer, Timing of Satisfaction of Performance Obligation and Payment | Payments are received in installments over the construction period. | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation | For the nine-month period of 2021, we recognized revenue of $62 million in the “Sales and other operating revenues” line on our consolidated income statement. No revenue was recognized during the three-month period ended September 30, 2021. We expect to recognize the contract liabilities as of September 30, 2021, as revenue during 2022. | ||
| Change in Contract with Customer, Liability [Abstract] | |||
| Contract Liabilities, Beginning Balance | $ 97,000,000 | ||
| Contractual payments received | 7,000,000 | ||
| Revenue recognized | 0 | (62,000,000) | |
| Contract Liabilities, Ending Balance | 42,000,000 | 42,000,000 | |
| Contract with Customer Liability [Abstract] | |||
| Current liabilities | $ 42,000,000 | $ 42,000,000 |