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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE The table below illustrates the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share, the latter of which uses the treasury stock method in order to calculate the dilutive effect of the Company’s potential common stock:
(in millions, except per share amounts) | 2021 |  | 2020 |  | 2019
Computation of Basic Earnings Per Share |  |  |  |  |
Net income (loss) | $ | 1,099 |  |  | $ | (267) |  |  | $ | 1,273 |
Shares for basic earnings per share | 327.2 |  |  | 325.8 |  |  | 332.7 |
Basic earnings (loss) per share | $ | 3.36 |  |  | $ | (0.82) |  |  | $ | 3.83 |
Computation of Diluted Earnings Per Share |  |  |  |  |
Net income (loss) | $ | 1,099 |  |  | $ | (267) |  |  | $ | 1,273 |
Shares for basic earnings per share | 327.2 |  |  | 325.8 |  |  | 332.7 |
Effect of dilutive securities |  |  |  |  |
Stock-based compensation(1) | 2.1 |  |  | — |  |  | 2.8 |
Shares for diluted earnings per share | 329.3 |  |  | 325.8 |  |  | 335.5 |
Diluted earnings (loss) per share | $ | 3.34 |  |  | $ | (0.82) |  |  | $ | 3.80 |
(1) For the calculation of diluted loss per share for 2020, we excluded share-based compensation securities of 1.4 million because the effect was anti-dilutive.

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