Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Additional Information (Detail)

v3.20.2
STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 01, 2020
Feb. 12, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Aug. 12, 2020
May 13, 2020
Mar. 23, 2020
Feb. 06, 2020
Stockholders Equity Note [Line Items]                          
Stock compensation expense     $ 140     $ 203 $ 508 $ 716          
Stock Repurchase Program, Remaining Authorized Repurchase Amount     2,100       2,100            
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]                          
Stockholders Equity Note [Line Items]                          
Reclassification to earnings, tax effect     $ 0     $ (1) $ (1) $ (1)          
Management Incentive Award                          
Stockholders Equity Note [Line Items]                          
Award vesting period             5 years            
Closing New York Stock Exchange price   $ 105.54                   $ 91.90 $ 106.51
Long-Term Incentive Performance Award                          
Stockholders Equity Note [Line Items]                          
Award vesting period             3 years            
Closing New York Stock Exchange price $ 99.08                 $ 186.67      
Weighted-average fair value of options granted (usd per share)             $ 92.77   $ 123.44        
Long-Term Incentive Performance Award | Restricted Units                          
Stockholders Equity Note [Line Items]                          
Closing New York Stock Exchange price                     $ 91.65    
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       0.1 300,000                
Weighted-average fair value of options granted (usd per share) $ 99.28 $ 105.54