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Earnings Per Share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE
Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding for the period, including vested RSU awards. Diluted EPS is computed by dividing net income by the weighted average number of shares outstanding, noted above, adjusted for the dilutive effect of stock options and unvested RSU awards.
The following table presents the calculation of basic and diluted EPS:
 202120202019
Net income from continuing operations
$1,373.3 $381.8 $450.8 
Loss from discontinued operations, net of income taxes(0.3)(0.2)(0.8)
Net income
$1,373.0 $381.6 $450.0 
Basic weighted average common shares outstanding74.2 88.3 90.1 
Dilutive effect of stock options and unvested RSUs0.8 0.4 0.4 
Diluted weighted average common shares outstanding75.0 88.7 90.5 
Basic EPS amounts(1):
Continuing operations
$18.51 $4.32 $5.00 
Discontinued operations
$— $— $(0.01)
Net income
$18.50 $4.32 $4.99 
Diluted EPS amounts(1):
Continuing operations
$18.31 $4.30 $4.98 
Discontinued operations
$— $— $(0.01)
Net income
$18.31 $4.30 $4.97 
(1) EPS amounts are calculated discretely and, therefore, may not add up to the total due to rounding.

A summary of anti-dilutive equity instruments excluded from the computation of diluted EPS is as follows:
 202120202019
Anti-dilutive equity instruments excluded from the computation of diluted EPS— 1.7 2.4