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INCOME TAXES - Deferred Tax Liabilities and Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Fixed assets and capitalized software | $ (4,010) | $ (3,288)
Other | (493) | (532)
Deferred tax liabilities | (4,503) | (3,820)
Pension and postretirement benefits | 1,743 | 1,877
Loss and credit carryforwards | 298 | 323
Insurance reserves | 437 | 449
Stock compensation | 189 | 182
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation | 274 | 266
Other | 196 | 359
Deferred tax assets | 3,137 | 3,456
Deferred tax assets valuation allowance | (112) | (126)
Deferred tax asset (net of valuation allowance) | 3,025 | 3,330
Amounts recognized in the consolidated balance sheets: |  |
Deferred tax assets | 141 | 266
Deferred tax liabilities | (1,619) | (756)
Deferred Tax Liabilities, Net | $ (1,478) | $ (490)

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