Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Additional Information (Detail)

v3.19.3.a.u2
STOCK-BASED COMPENSATION - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation expense $ 915 $ 634 $ 584
Share-based Payment Arrangement, Expense, Tax Benefit $ 216 $ 186 $ 227
Share-based Compensation Arrangement by Share-based Payment Award, Target Award Minimum, Percentage 0.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Target Award Maximum, Percentage 200.00%    
Discounted Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Issued During Period, Shares, Employee Stock Purchase Plans 1,000,000 900,000 900,000
Stock Issued Employee Stock Purchase Plan Average Price Per Share $ 102.11 $ 105.53 $ 108.98
Incentive Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 26,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 13,000,000    
Incentive Compensation Plan [Member] | Restricted Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Decrease In Number Of Shares Available For Grant For Each Share Of Award Granted 1    
Management Incentive Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 years 1 month    
Long Term Incentive Performance Award | Restricted Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant date fair value of Stock Units granted $ 108.78 $ 110.95 $ 105.62
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 1 year 8 months    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 457 $ 596 $ 534
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 341    
Long Term Incentive Performance Award | Restricted Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 3 years    
Weighted-average grant date fair value of Stock Units granted $ 107.30 $ 111.42 $ 105.65
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 71 $ 97 $ 71
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount 103    
Nonqualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Proceeds from Stock Options Exercised $ 7 12 41
Vesting (exercisable) period of awards 5 years    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 3 years 5 months    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 5 6 22
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 2    
Percentage of the award vesting at each anniversary date of the grant 20.00%    
Discounted Employee Stock Purchase Modified Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of Stock 95.00%    
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 1 year    
Minimum | Management Incentive Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Paid in Restricted Units, Percent 50.00%    
Minimum | Long Term Incentive Performance Award | Restricted Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Consolidated operating return 33.33%    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 5 years    
Maximum | Management Incentive Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Paid in Restricted Units, Percent 66.67%    
Maximum | Long Term Incentive Performance Award | Restricted Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Consolidated operating return 66.67%    
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Exercise of Option, Tax Benefit $ 148 $ 175 $ 276
Restricted Stock Units (RSUs) [Member] | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 1 year    
Restricted Stock Units (RSUs) [Member] | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 4 years    
Share-based Payment Arrangement, Tranche One [Member] | Management Incentive Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 5 years    
Percentage of the award vesting at each anniversary date of the grant 20.00%    
Share-based Payment Arrangement, Tranche Two [Member] | Management Incentive Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting (exercisable) period of awards 1 year