Income Taxes - Components of deferred tax liabilties and assets (Details) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 02, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Deferred Tax Liabilities | |||
| Properties, plants and equipment, and intangibles | $ 8,660 | $ 8,004 | |
| Inventory | 35 | 60 | |
| Deferred state income tax | 0 | 61 | |
| Other | 234 | 156 | |
| Total deferred tax liabilities | 8,929 | 8,281 | |
| Deferred Tax Assets | |||
| Benefit plan accruals | 542 | 641 | |
| Asset retirement obligations and accrued environmental costs | 2,339 | 2,891 | |
| Investments in joint ventures (Asset) | 1,722 | 104 | |
| Other financial accruals and deferrals | 777 | 330 | |
| Loss and credit carryforwards | 8,968 | 2,378 | |
| Other | 345 | 398 | |
| Total deferred tax assets | 14,693 | 6,742 | |
| Less valuation allowance | (10,214) | (3,040) | |
| Net deferred tax assets | 4,479 | $ 151 | 3,702 |
| Total deferred tax liabilities | $ 4,450 | $ 4,579 |
| X | ||||||||||
- Definition Deferred tax assets asset retirement obligations and accrued environmental costs. No definition available.
|
| X | ||||||||||
- Definition Deferred tax assets other financial accruals and deferrals. No definition available.
|
| X | ||||||||||
- Definition The amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the basis of capital assets and intangibles computed in accordance with generally accepted and the tax basis. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from investments (excludes investments in subsidiaries and equity method investments). No definition available.
|
| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible loss carryforwards, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax consequences attributable to taxable temporary differences derived from inventory. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or income classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|