Inventories (Schedule of Inventories) (Details) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Inventories [Abstract] | ||
| Crude oil and natural gas | $ 647 | $ 461 |
| Materials and supplies | 561 | 541 |
| Total Inventories | 1,208 | 1,002 |
| Inventories valued on the LIFO basis | 395 | 282 |
| Excess Of Replacement Or Current Costs Over Stated L I F O Value | $ 251 | $ 87 |
| X | ||||||||||
- Definition The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of finished goods inventories for petroleum products, crude oil, petrochemical products, and other oil and gas inventories. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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