Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Additional Information (Detail)

v3.21.1
STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 25, 2021
Feb. 10, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Mar. 22, 2021
Stockholders Equity Note [Line Items]            
Stock compensation expense     $ 315 $ 231    
Stock Repurchase Program, Remaining Authorized Repurchase Amount     2,100      
Tangible Asset Impairment Charges     24 0    
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]            
Stockholders Equity Note [Line Items]            
Reclassification to earnings, tax effect     0 0    
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]            
Stockholders Equity Note [Line Items]            
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax     4,901 0    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax     (2,475) 43    
Other Comprehensive Income Net Actuarial Gains and Prior Service Cost Arising During Period, Tax     $ 1,544 $ 0    
Management Incentive Award            
Stockholders Equity Note [Line Items]            
Closing New York Stock Exchange price   $ 165.66       $ 161.06
Long-Term Incentive Performance Award            
Stockholders Equity Note [Line Items]            
Award vesting period     3 years      
Weighted-average fair value of options granted (usd per share)     $ 167.17   $ 92.77  
Long-Term Incentive Performance Award | Restricted Units | Year 2020            
Stockholders Equity Note [Line Items]            
Weighted-average fair value of options granted (usd per share) $ 167.66          
Long-Term Incentive Performance Award | Restricted Units | Year 2021            
Stockholders Equity Note [Line Items]            
Weighted-average fair value of options granted (usd per share) $ 166.52          
Nonqualified Stock Options            
Stockholders Equity Note [Line Items]            
Award vesting period     5 years      
Percentage of the award vesting at each anniversary date of the grant     20.00%      
Expiration period (in years)     10 years      
Stock options granted     200,000      
Weighted-average fair value of options granted (usd per share)   $ 165.66