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STOCKHOLDERS' EQUITY - Preferred Stock Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Oct. 28, 2019
Sep. 30, 2019
Sep. 30, 2018
Class of Stock [Line Items]      
Preferred stock issued   $ 293 $ 296
Redemption price per share (usd per share)   $ 1,000  
Redemption notice period   90 days  
Subsequent Event | Series E Preferred Stock      
Class of Stock [Line Items]      
Preferred stock issued $ 450    
Depositary shares issued (in shares) 18,000,000    
Depository share interest percentage 2.50%    
Preferred stock, dividend rate 5.00%    
Redemption price per share (usd per share) $ 1,000    
Liquidation preference per depository share (usd per share) $ 25    
Proceeds from issuance of stock $ 437    
Redemption notice period 90 days