EARNINGS PER COMMON SHARE COMPUTATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available for common stockholders	$ 930	$ 828
Weighted average outstanding shares of common stock used to compute basic earnings per common share (in shares)	126,938	128,931
Shares used to compute diluted earnings per common share (in shares)	127,474	129,551
Basic earnings per common share (in dollars per share)	$ 7.32	$ 6.42
Diluted earnings per common share (in dollars per share)	$ 7.29	$ 6.39
Number of antidilutive stock options and restricted stock excluded from computation (in shares)	626	531
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)	40	52
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)	496	568