Quarterly report pursuant to Section 13 or 15(d)

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

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STOCK-BASED COMPENSATION - Fair Value of Employee Stock Options Granted as Determined by Black-Scholes Valuation Model Assumptions (Detail) - $ / shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Nonqualified Stock Options [Member]    
Stockholders Equity Note [Line Items]    
Risk-free interest rate 2.60% 2.84%
Expected volatility 17.79% 16.72%
Weighted-average fair value of options granted (usd per share) $ 16.39 $ 15.23
Expected dividend yield 2.93% 2.93%
Expected life (in years) 7 years 6 months 7 years 6 months
Long-Term Incentive Performance Award    
Stockholders Equity Note [Line Items]    
Risk-free interest rate 2.24% 2.61%
Expected volatility 19.61% 16.51%
Weighted-average fair value of options granted (usd per share) $ 123.40 $ 137.57
Expected dividend yield 114.95% 123.47%