EARNINGS PER COMMON SHARE COMPUTATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available for common stockholders	$ 2,933	$ 3,367	$ 2,707
Weighted-average outstanding shares of common stock used to compute basic earnings per common share (in shares)	128,688	132,199	134,055
Shares used to compute diluted earnings per common share (in shares)	129,396	133,012	134,727
Basic earnings per common share (in dollars per share)	$ 22.79	$ 25.47	$ 20.20
Diluted earnings per common share (in dollars per share)	$ 22.67	$ 25.31	$ 20.10
Number of antidilutive stock options and restricted stock awards excluded from computation (in shares)	216	238	478
Employee stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of employee stock options and restricted stock (in shares)	64	92	107
Restricted stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive effect of employee stock options and restricted stock (in shares)	644	721	565