STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement, Noncash Expense [Abstract]

Stock-Based Compensation Cost and Associated Tax Benefit

Presented below is a summary of the stock-based compensation cost and associated tax benefit included in the accompanying consolidated statements of operations:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Stock-based compensation cost	$	41	$	35	$	86	$	72
Tax benefit	$	10	$	7	$	21	$	14

Weighted Average Assumptions used in Determining Fair Value for Options Granted

The following weighted average assumptions were used in determining the fair value for options granted in 2021:

Expected dividend yield	0.89	%
Expected stock volatility	28	%
Risk-free interest rate	0.81 %
Expected holding period	5.6 years

Stock Option Exercises and Restricted Stock Vesting

The following tables summarize information relating to stock option exercises and restricted stock vesting:

	Six Months Ended June 30,
	2021		2020
Exercise of stock options:
Proceeds from stock option exercises	$	16	$	23
Aggregate intrinsic value	$	35	$	74
Tax benefit realized upon exercise	$	8	$	18
Number of shares exercised	0.2		0.4
Vesting of restricted stock:
Fair value of shares vested	$	187	$	193
Tax benefit realized upon vesting	$	43	$	45
Number of shares vested	0.7		0.8
Vesting of performance-based restricted stock:
Fair value of shares vested	$	28	$	70
Tax benefit realized upon vesting	$	7	$	17
Number of shares vested	0.1		0.3