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Capital Stock (Tables)
 12 Months Ended
Dec. 31, 2024
Equity [Abstract]  
Schedule of Weighted Average Number of Shares
Shares Used to Calculate Earnings per Share

Years Ended December 31,
(In millions)202420232022
Weighted-average shares   
Basic(a)
44.3 46.2 47.3 
Effect of dilutive stock awards0.5 0.7 0.5 
Diluted(a)
44.8 46.9 47.8 
Antidilutive stock excluded from denominator (b)
— 0.3 0.6 

(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, basic and diluted shares include weighted-average units of 0.2 million in 2024, 0.3 million in 2023 and 0.3 million in 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 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.