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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Basic and Diluted EPS 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.
Anti-Dilutive Equity Instruments Excluded From The Computation Of Diluted Earnings Per Share
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