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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Reconciliation of the Earnings and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share | The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share:
| Three Months Ended |  |
(in millions, except per share amounts) | March 31, 2021 |  | March 31, 2020 |  |  |  |
Computation of Basic (Loss) Earnings Per Share |  |  |  |  |  |  |
Net (loss) income | $ | (11) |  |  | $ | 31 |  |  |  |  |
Shares for basic (loss) earnings per share | 326.7 |  |  | 325.4 |  |  |  |  |
Basic (loss) earnings per share | $ | (0.03) |  |  | $ | 0.10 |  |  |  |  |
Computation of Diluted (Loss) Earnings Per Share |  |  |  |  |  |  |
Net (loss) income | $ | (11) |  |  | $ | 31 |  |  |  |  |
Shares for basic (loss) earnings per share | 326.7 |  |  | 325.4 |  |  |  |  |
Effect of dilutive securities |  |  |  |  |  |  |
Stock-based compensation (1) | — |  |  | 2.0 |  |  |  |  |
Shares for diluted (loss) earnings per share | 326.7 |  |  | 327.4 |  |  |  |  |
Diluted (loss) earnings per share | $ | (0.03) |  |  | $ | 0.09 |  |  |  |  |
(1) For the calculation of diluted loss per share for the three months ended March 31, 2021, we excluded stock-based compensation securities of 2.3 million because the effect was anti-dilutive.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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