EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator (basic and diluted):
Net income	$ 2,319	$ 1,057	$ 1,791
Less: Preferred stock dividends	113	107	73
Net income available to common stockholders	$ 2,206	$ 950	$ 1,718
Denominator:
Weighted-average common shares outstanding - basic (in shares)	425,669,451	427,062,537	449,731,453
Dilutive common shares: share-based awards (in shares)	1,766,367	1,095,243	1,482,248
Weighted-average common shares outstanding - diluted (in shares)	427,435,818	428,157,780	451,213,701
Earnings per common share:
Basic (in dollars per share)	$ 5.18	$ 2.22	$ 3.82
Diluted (in dollars per share)	$ 5.16	$ 2.22	$ 3.81
Antidilutive securities (in shares)	2,929	1,338,130	783