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Net Income (Loss) Per Share (Notes) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Net Income (Loss) Per Share The following table sets forth the computation of Net Income (Loss) Per Share for the years ended December 31, 2021, 2020 and 2019 (in millions, except per share data):
| 2021 |  | 2020 |  | 2019
Numerator for Basic and Diluted Earnings per Share - |  |  |  |  |
Net Income (Loss) | $ | 4,664 |  |  | $ | (605) |  |  | $ | 2,735 |
Denominator for Basic Earnings per Share - |  |  |  |  |
Weighted Average Shares | 581 |  |  | 579 |  |  | 578 |
Potential Dilutive Common Shares - |  |  |  |  |
Stock Options/SARs | — |  |  | — |  |  | — |
Restricted Stock/Units and Performance Units | 3 |  |  | — |  |  | 3 |
Denominator for Diluted Earnings per Share - |  |  |  |  |
Adjusted Diluted Weighted Average Shares | 584 |  |  | 579 |  |  | 581 |
Net Income (Loss) Per Share |  |  |  |  |
Basic | $ | 8.03 |  |  | $ | (1.04) |  |  | $ | 4.73 |
Diluted | $ | 7.99 |  |  | $ | (1.04) |  |  | $ | 4.71 |
The diluted earnings per share calculation excludes stock option, SAR, restricted stock, restricted stock unit, Performance Unit and ESPP grants that were anti-dilutive. Shares underlying the excluded stock option, SAR and ESPP grants were 6 million, 10 million and 6 million for the years ended December 31, 2021, 2020 and 2019, respectively. For the year ended December 31, 2020, 5 million shares underlying grants of restricted stock, restricted stock units and Performance Units were excluded.

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