Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail)

v3.20.4
STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Long Term Incentive Performance Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.15% 2.23% 2.61%
Expected dividend yield 101.00% 115.04% 123.47%
Risk-free interest rate 27.53% 19.64% 16.51%
Weighted-average fair value of options granted $ 92.77 $ 123.44 $ 137.57
Nonqualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.26% 2.60% 2.84%
Expected dividend yield 3.51% 2.94% 2.93%
Risk-free interest rate 19.25% 17.79% 16.72%
Expected life in years 7 years 6 months 7 years 6 months 7 years 6 months
Weighted-average fair value of options granted $ 11.74 $ 16.34 $ 15.23