Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Deferred Tax Liabilities and Assets (Detail)

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INCOME TAXES - Deferred Tax Liabilities and Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
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)