Annual report pursuant to Section 13 and 15(d)

Earnings per Share - Schedule of Earnings Per Share (Details)

v3.20.4
Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Numerator:                      
Net Income available to common stockholders for basic net income per common share                 $ 131 $ 914 $ 1,176
Effect of interest on assumed conversions of convertible notes, net of tax                 8 7 0
Net Income available to common stockholders for dilutive net income per common share                 $ 139 $ 921 $ 1,176
Denominator:                      
Weighted average common shares outstanding for basic net income per common share (in shares)                 4,330 4,501 4,462
Weighted average impact of assumed convertible notes (in shares)                 30 28 0
Weighted average impact of dilutive equity instruments (in shares)                 69 87 99
Weighted average shares for diluted net income per common share (in shares)                 4,429 4,616 4,561
Net income per common share:                      
Basic (in USD per share) $ (0.16) $ 0.06 $ 0.06 $ 0.07 $ 0.05 $ 0.06 $ 0.06 $ 0.04 $ 0.03 $ 0.20 $ 0.26
Diluted (in USD per share) $ (0.16) $ 0.06 $ 0.05 $ 0.07 $ 0.05 $ 0.05 $ 0.06 $ 0.03 $ 0.03 $ 0.20 $ 0.26