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INCOME TAXES - COMPONENTS OF DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax liabilities |  |
Property, plant and equipment differences | $ (9,905) | $ (10,744)
Equity investments, partnerships and international subsidiaries | (571) | (658)
Gross long-term deferred tax liabilities | (10,476) | (11,402)
Deferred tax assets |  |
Environmental reserves | 242 | 257
Postretirement benefit accruals | 285 | 398
Deferred compensation and benefits | 286 | 186
Asset retirement obligations | 850 | 942
Foreign tax credit carryforwards | 3,904 | 4,465
General business credit carryforwards | 698 | 607
Net operating loss carryforward | 1,628 | 1,797
Interest expense carryforward | 28 | 668
All other | 689 | 720
Gross long-term deferred tax assets | 8,610 | 10,040
Valuation allowance | (5,136) | (5,695)
Net long-term deferred tax assets | 3,474 | 4,345
Total deferred income tax liability, net | (7,002) | (7,057)
Net long-term deferred tax assets | (37) | (56)
Total deferred income tax liability, gross | $ (7,039) | $ (7,113)

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from currently non-deductible expenses in environmental reserves, which can only be deducted for tax purposes when such liabilities are actually incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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