v3.19.3.a.u2
Equity - Textuals (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended 37 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Feb. 01, 2020
Equity [Abstract]          
Preferred Stock, Authorized 500,000,000     500,000,000  
Preferred Stock, Par or Stated Value Per Share $ 0.01     $ 0.01  
Preferred Stock, Shares Issued 0     0  
Preferred Stock, Shares Outstanding 0     0  
Stockholders' Equity Attributable to Noncontrolling Interest $ 69 $ 125   $ 69  
Treasury Stock, Shares, Acquired       168,553,141  
Treasury Stock Value Acquired Cost Method 3,500 $ 2,999 $ 3,000 $ 9,625  
Stock Repurchase Program Authorized $ 15,000     $ 15,000  
Cumulative amount of stock repurchase plan authorized         $ 25,000