INCOME TAXES - Deferred Tax Liabilities and Assets (Detail) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Income Tax Disclosure [Abstract] | ||
| Deferred Tax Liabilities, Leasing Arrangements | $ (730) | $ (685) |
| Fixed assets and capitalized software | (5,355) | (4,720) |
| Other | (501) | (538) |
| Deferred tax liabilities | (6,586) | (5,943) |
| Pension and postretirement benefits | 3,994 | 2,522 |
| Loss and credit carryforwards | 325 | 328 |
| Insurance reserves | 535 | 413 |
| Stock compensation | 183 | 249 |
| Accrued employee compensation | 583 | 287 |
| Operating lease liabilities | 736 | 691 |
| Other | 357 | 205 |
| Deferred tax assets | 6,713 | 4,695 |
| Deferred tax assets valuation allowance | (88) | (54) |
| Deferred tax asset (net of valuation allowance) | 6,625 | 4,641 |
| Net deferred tax asset (liability) | (39) | (1,302) |
| Deferred income tax assets | 527 | 330 |
| Deferred Income Tax Liabilities, Net | 488 | 1,632 |
| Amounts recognized in the consolidated balance sheets: | ||
| Net deferred tax asset (liability) | $ (39) | $ (1,302) |
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- Definition Deferred Tax Asset And Liabilities Amounts Recognized In Balance Sheet [Abstract] No definition available.
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- Definition Deferred Tax Asset, Operating Lease Liability No definition available.
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- Definition Deferred Tax Assets Operating Loss And Tax Credit Carry forwards Foreign No definition available.
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- Definition Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pension And Postretirement Benefits No definition available.
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- Definition Deferred Tax Liabilities, Gross No definition available.
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and other assets expected to be realized or consumed after one year or normal operating cycle, if longer. No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated losses under self insurance. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- 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://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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