TREASURY STOCK - Summary of Stock Repurchase Activities (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Repurchases (in shares)	71	685	4,445
Total Repurchases	$ 162	$ 1,264	$ 8,153
General authorization for shares withheld on stock award vesting (in shares)	71	84	87
General authorization for shares withheld on stock award vesting	$ 162	$ 142	$ 151
Shares repurchased in December and settled in following January (in shares)	0	0	19
Shares repurchased in December and settled in following January	$ 0	$ 0	$ 40
Authorized stock repurchase programs
Equity, Class of Treasury Stock [Line Items]
Repurchases (in shares)	0	601	4,358
Total Repurchases	$ 0	$ 1,122	$ 8,002