EARNINGS PER COMMON SHARE COMPUTATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available for common stockholders	$ 959	$ 696	$ 2,198	$ 1,626
Weighted average outstanding shares of common stock used to compute basic earnings per common share (in shares)	124,574	126,523	124,790	126,730
Shares used to compute diluted earnings per common share (in shares)	125,109	127,084	125,336	127,279
Basic earnings per common share (in dollars per share)	$ 7.70	$ 5.50	$ 17.62	$ 12.83
Diluted earnings per common share (in dollars per share)	$ 7.66	$ 5.48	$ 17.54	$ 12.77
Number of antidilutive stock options and restricted stock excluded from computation (in shares)	78	98	308	362
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)	34	47	34	44
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)	501	514	512	505