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Equity Equity Repurchase Program (Details) - USD ($)
shares in Millions, $ in Millions
1 Months Ended 6 Months Ended
Jul. 27, 2021
Jun. 30, 2021
Jun. 30, 2020
Apr. 01, 2021
Jan. 01, 2021
Equity, Class of Treasury Stock [Line Items]          
Value of shares acquired   $ 691 $ 150    
Number of shares acquired   11.0 2.7    
Stock repurchase authorization amount       $ 2,500 $ 1,500
Subsequent Event [Member]          
Equity, Class of Treasury Stock [Line Items]          
Value of shares acquired $ 116        
Number of shares acquired 1.9