Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.19.3
Subsequent Events (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 10, 2019
Jul. 18, 2019
Jul. 16, 2019
Apr. 23, 2019
Jan. 29, 2019
Oct. 29, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Jul. 02, 2019
Subsequent Event [Line Items]                      
Loss on extinguishment of debt             $ 56 $ 0 $ 57 $ 0  
Aggregate cost for shares repurchased                 1,959 $ 662  
Dividends declared per common share (in dollars per share)     $ 0.0121 $ 0.0121 $ 0.0121            
Subsequent Event                      
Subsequent Event [Line Items]                      
Aggregate cost for shares repurchased           $ 54          
Dividends declared per common share (in dollars per share) $ 0.01331                    
Subsequent Event | Common Stock                      
Subsequent Event [Line Items]                      
Number of shares repurchased (in shares)           9          
Senior Notes | 4.625% Senior Notes Due 2024                      
Subsequent Event [Line Items]                      
Principal amount             1,500   1,500   $ 1,500
Stated interest rate (as a percent)                     4.625%
Senior Notes | 6.00% Senior Note Due 2024                      
Subsequent Event [Line Items]                      
Principal amount   $ 1,500         $ 0   $ 0    
Stated interest rate (as a percent)   6.00%         6.00%   6.00%    
Loss on extinguishment of debt   $ (56)