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Earnings per Share (Notes)
 6 Months Ended
Jun. 30, 2024
Earnings Per Share [Abstract]  
Earnings per Share
12. Earnings per Share

Basic and diluted earnings per share were computed as follows:
 Three Months Ended June 30, Six Months Ended June 30,
(in millions, except per share amounts)2024202320242023
Net (loss) earnings $(259.3)$13.6 $(256.8)$8.4 
Basic:
Net (loss) earnings per share$(2.90)$0.15 $(2.87)$0.09 
Weighted-average shares outstanding89.4 91.4 89.5 91.4 
Diluted:
Net (loss) earnings per share$(2.90)$0.15 $(2.87)$0.09 
Weighted-average shares outstanding89.4 91.8 89.5 92.1 

For the three and six months ended June 30, 2024, the weighted-average number of anti-dilutive potential common shares for stock-based awards excluded from the diluted earnings per share calculation above was 1.8 million and 2.6 million, respectively. For the three and six months ended June 30, 2023, the weighted-average number of anti-dilutive potential common shares for stock-based awards excluded from the diluted earnings per share calculation above was 3.3 million and 2.4 million, respectively.