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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator (basic and diluted):
Net income	$ 611	$ 34
Less: Preferred stock dividends	23	22
Net income available to common stockholders	$ 588	$ 12
Denominator:
Weighted-average common shares outstanding - basic (in shares)	425,953,716	427,718,421
Dilutive common shares: share-based awards (in shares)	1,926,814	1,670,434
Weighted-average common shares outstanding - diluted (in shares)	427,880,530	429,388,855
Earnings per common share:
Basic (in dollars per share)	$ 1.38	$ 0.03
Diluted (in dollars per share)	$ 1.37	$ 0.03
Share-based awards excluded from diluted earnings per share computation (in shares)	305,210	1,030,745

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-Section 45
-Paragraph 16
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256

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