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Earnings Per Share (Tables)
 9 Months Ended
Oct. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share, Basic and Diluted
The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted EPS computations:
Three Months Ended
October 31,		Nine Months Ended
October 31,
(in millions)2020201920202019
Net earnings for basic and diluted EPS$119.0 $78.4 $86.3 $339.9 
Weighted-average shares for basic EPS121.4 120.3 121.3 121.0 
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units
0.3 0.3 0.4 0.3 
Weighted-average shares for diluted EPS121.7 120.6 121.7 121.3