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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
May 27, 2020
Mar. 31, 2020
Jan. 30, 2020
Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]                
Dividends Declared per Common Share $ 0.40 $ 0.30 $ 1.20 $ 0.90        
Accelerate Share Repurchase                
Accelerated share repurchases                
Accelerated share repurchases settlement receipt         $ 500      
Stock Repurchase Program Authorized Amount           $ 500 $ 500 $ 250