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Earnings per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Numerator: |  |
Net Income available to common stockholders for basic net income per common share | $ 309 | $ 219
Effect of interest on assumed conversions of convertible notes, net of tax | 2 | 2
Net Income available to common stockholders for dilutive net income per common share | $ 311 | $ 221
Denominator: |  |
Weighted average common shares outstanding for basic net income per common share (in shares) | 3,948 | 4,137
Weighted average impact of assumed convertible notes (in shares) | 31 | 30
Weighted average impact of dilutive equity instruments (in shares) | 45 | 55
Weighted average shares for diluted net income per common share (in shares) | 4,024 | 4,222
Net income per common share: |  |
Basic (in USD per share) | $ 0.08 | $ 0.05
Diluted (in USD per share) | $ 0.08 | $ 0.05

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