Annual report pursuant to Section 13 and 15(d)

Share Repurchase Program (Details)

v3.20.4
Share Repurchase Program (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity [Abstract]      
Stock Repurchase Program, Period in Force 3 years    
Stock Repurchase Program, Authorized Amount $ 1,000    
Total amount paid (in millions) $ 155 $ 249 $ 0