EARNINGS PER COMMON SHARE COMPUTATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available for common stockholders	$ 832	$ 1,195	$ 3,030	$ 2,821
Weighted average outstanding shares of common stock used to compute basic earnings per common share (in shares)	123,426	126,572	124,335	126,678
Shares used to compute diluted earnings per common share (in shares)	123,983	127,356	124,885	127,305
Basic earnings per common share (in dollars per share)	$ 6.74	$ 9.45	$ 24.37	$ 22.27
Diluted earnings per common share (in dollars per share)	$ 6.71	$ 9.39	$ 24.26	$ 22.16
Number of antidilutive stock options and restricted stock excluded from computation (in shares)	137	78	251	267
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)	26	61	31	50
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)	531	723	519	577