Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Additional Information (Detail)

v3.21.2
STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 25, 2021
Feb. 10, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Mar. 22, 2021
Stockholders Equity Note [Line Items]                
Stock compensation expense     $ 206 $ 137 $ 521 $ 368    
Total of Class A and Class B common stock, repurchased, value           $ 231    
Common stock purchases     0 0 0 2,100,000    
Share repurchase authorization available     $ 2,100   $ 2,100      
Tangible Asset Impairment Charges     0 $ 0 24 $ 0    
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]                
Stockholders Equity Note [Line Items]                
Reclassification to earnings, tax effect     0 (1) 0 (1)    
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     1,569 0 6,470 0    
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax     25 44        
Other Comprehensive Income Net Actuarial Gains and Prior Service Cost Arising During Period, Tax     $ 495 $ 0 2,039 0    
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Remeasurement of plan assets and liabilities (net of tax effect of $0 and $214) (1)         $ (2,450) $ 87    
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)         $ 167.26   $ 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