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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Basic and Diluted Earnings Per Share
The following table presents the calculation of basic and diluted EPS:
Three Months EndedSix Months Ended
June 30,June 30,
 2021202020212020
Net income from continuing operations$384.9 $279.9 $624.4 $47.7 
Loss from discontinued operations, net of income taxes(0.1)(0.1)(0.2)(0.2)
Net income$384.8 $279.8 $624.2 $47.5 
Basic weighted average common shares outstanding
78.9 87.9 81.0 89.0 
Dilutive effect of stock options and unvested RSUs
0.8 0.2 0.8 — 
Diluted weighted average common shares outstanding
79.7 88.1 81.8 89.0 
Basic EPS amounts(1):
Continuing operations
$4.88 $3.18 $7.71 $0.54 
Discontinued operations
$— $— $— $— 
Net income$4.88 $3.18 $7.71 $0.53 
Diluted EPS amounts(1):
Continuing operations
$4.83 $3.18 $7.63 $0.54 
Discontinued operations
$— $— $— $— 
Net income$4.83 $3.18 $7.63 $0.53 
(1) EPS amounts are calculated discretely and, therefore, may not add up to the total due to rounding.
Anti-Dilutive Equity Instruments Excluded From The Computation Of Diluted EPS A summary of anti-dilutive equity instruments excluded from the computation of diluted EPS is as follows:
Three Months EndedSix Months Ended
 June 30,June 30,
 2021202020212020
Anti-dilutive equity instruments excluded from the computation of diluted EPS— 2.4 — 2.7