EMPLOYEE BENEFIT PLANS - Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-based compensation expense [Line Items]
Total stock-based compensation expense	$ 180	$ 181	$ 163
Tax benefit recognized	(15)	(29)	(35)
Stock-based compensation expense, net of tax	165	152	128
Restricted stock
Stock-based compensation expense [Line Items]
Total stock-based compensation expense	171	171	152
Stock options
Stock-based compensation expense [Line Items]
Total stock-based compensation expense	$ 9	$ 10	$ 11