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Earnings Per Share - Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands
3 Months Ended
Feb. 12, 2020
Mar. 31, 2020
Mar. 31, 2019
Jan. 31, 2019
Feb. 28, 2018
Oct. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Increase in quarterly dividend percentage 8.00%          
Common stock dividends, per share (in dollars per share) $ 0.26          
Share Repurchase Program January 2019            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Share repurchase program authorized amount       $ 5,000,000,000    
Remaining authorized amount under share repurchase program   $ 1,200,000,000        
Share Repurchase Program October 2017            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Share repurchase program authorized amount         $ 5,000,000,000 $ 1,500,000,000
Stock Options            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Antidilutive securities excluded from diluted earnings per share calculation (in shares)   1,400 600