Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Additional Information (Details)

v3.24.0.1
INCOME TAXES - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Taxes [Line Items]      
Effective income tax rate 21.80% 22.10% 22.30%
Transformation cost $ 435 $ 178 $ 380
Effective income tax rate reconciliation, nondeductible expense, restructuring charges, amount 102 36 95
Gain (loss) on mark to market of defined benefit plan, tax benefit 85 255 784
Gain (loss) on mark to market of defined benefit plan (359) 1,100 3,300
Goodwill and Intangible Asset Impairment 236    
Additional income tax benefit 43    
Payments for nonrecurring compensation 61    
Income tax benefit, nonrecurring compensation 15    
Share-based payment arrangement, expense   505  
Amount taxed at higher rate   121  
Increase in accumulated depreciation, depletion   76  
Residual value reduction   18  
Tax expense (benefit) from share-based compensation   $ (95) $ (105)
Reduction of effective tax rate due to share-based compensation benefits   0.60% 0.60%
Effective income tax rate reconciliation, nondeductible expense, impairment losses, amount     $ 11
Income tax holiday, decrease of non-U.S. tax expense $ 15 $ 47 $ 61
Income tax holiday, per share impact (in dollars per share) $ 0.02 $ 0.05 $ 0.07
Increase (decrease) in valuation allowance $ (4) $ 1 $ 34
Non-U.S. loss carryforwards 432    
Undistributed earnings of foreign subsidiaries 5,400    
Indefinitely reinvested undistributed earnings of foreign subsidiaries 493    
Deferred tax liability 3,646 4,163  
Gross unrecognized tax benefits that would impact effective tax rate, if recognized 492 $ 533 479
Other non-current liabilities      
Income Taxes [Line Items]      
Deferred tax liability 105    
Federal      
Income Taxes [Line Items]      
Operating loss carryforwards 200    
Federal | Tax Year 2025      
Income Taxes [Line Items]      
Operating loss carryforwards subject to expiration 1    
Federal | Tax Year 2026      
Income Taxes [Line Items]      
Operating loss carryforwards subject to expiration $ 150    
Discontinued Operations | UPS Freight      
Income Taxes [Line Items]      
Gain (loss) on disposition of business     $ 46