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Earnings per share
 3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Earnings Per Share
2.    Earnings per share
The following table presents the reconciliation of basic and diluted earnings per share for the three months ended March 31, 2023:
(in millions, except per share data)
Three months ended March 31, 2023
Earnings (numerator)Weighted average shares outstanding (denominator)Earnings per share
Basic$121.5 674.7 $0.18 
Dilutive effect of stock-based awards— 3.4 
Diluted$121.5 678.1 $0.18 
The following table presents the reconciliation of basic and diluted earnings per share for the three months ended March 31, 2022:
(in millions, except per share data)
Three months ended March 31, 2022
Earnings (numerator)Weighted average shares outstanding (denominator)Earnings per share
Basic$174.3 610.1 $0.29 
Dilutive effect of stock-based awards— 8.3 
Dilutive impact of MCPS16.1 62.9 
Diluted$190.4 $681.3 $0.28