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Calculation Of Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares [Table Text Block] | The following table presents the computation of weighted-average shares used in the calculation of basic and diluted earnings per share:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
| (In millions)
Weighted-average shares of common stock outstanding | 107.9 |  | 112.0 |  | 115.1
Weighted-average potential shares of common stock outstanding: |  |  |  |  |
Unvested RSUs and ESPP | 0.1 |  |  | 0.2 |  |  | 0.2 |
Shares used to compute diluted earnings per share | 108.0 |  | 112.2 |  | 115.3

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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