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Capital Stock (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Schedule of Weighted Average Number of Shares | Shares Used to Calculate Earnings per Share
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2023 |  | 2022 |  | 2023 |  | 2022
Weighted-average shares: |  |  |  |  |  |  |
Basic(a) | 46.5 |  |  | 47.4 |  |  | 46.6 |  |  | 47.5 |
Effect of dilutive stock awards and options | 0.6 |  |  | 0.1 |  |  | 0.7 |  |  | 0.4 |
Diluted | 47.1 |  |  | 47.5 |  |  | 47.3 |  |  | 47.9 |
Antidilutive stock awards and options excluded from denominator(b) | 0.4 |  |  | 0.5 |  |  | 0.4 |  |  | 0.7 |
(a)We have deferred compensation plans for directors and certain of our employees. Some amounts owed to participants are denominated in common stock units. Each unit represents one share of common stock. The number of shares used to calculate basic earnings per share includes the weighted-average common stock units credited to employees and directors under the deferred compensation plans. Additionally, nonvested units containing only a service requirement are also included in the computation of basic weighted-average shares when the requisite service period has been completed. Accordingly, included in basic shares are 0.3 million in the three months and 0.3 million in the nine months ended September 30, 2023, and 0.2 million in the three months and 0.3 million in nine months ended September 30, 2022. (b)Under the November 2021 ASR, based on our stock prices from November 1, 2021 to March 31, 2022, we would have received additional shares under the ASR if the settlement date had been March 31, 2022. Because the ASR settlement date did not occur until April 2022 and because any anticipated receipt of additional shares of our common stock would have been antidilutive, no amounts were included in the computation of diluted EPS. The antidilutive impact from the first quarter of 2022 continued to have year-to-date antidilutive impact for the remainder of 2022.

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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 -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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