SHAREHOLDERS' EQUITY - Summary of Stock Repurchase Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Shares Repurchased
Beginning of period, number of shares repurchased (in shares)	34,184,813
Ending of period, number of shares repurchased (in shares)	33,235,671	34,184,813
Cost of Shares Repurchased
Cost of shares repurchased	$ 78	$ 82	$ 465
Treasury Stock
Number of Shares Repurchased
Beginning of period, number of shares repurchased (in shares)	17,188,885
Repurchase of common stock (in shares)	492,510
Ending of period, number of shares repurchased (in shares)	17,681,395	17,188,885
Cost of Shares Repurchased
Beginning of period, cost of shares repurchased	$ 1,340
Cost of shares repurchased	78	$ 82	$ 465
Ending of period, cost of shares repurchased	$ 1,418	$ 1,340
Average Price Paid per Share
Beginning of period, average price paid per share (in usd per share)	$ 77.95
Average price paid per share (in usd per share)	157.77
Ending of period, average price paid per share (in usd per share)	$ 80.17	$ 77.95