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Net Income Per Share
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
NET INCOME PER SHARE NET INCOME PER SHARE 
Basic and diluted net income per share are calculated using the treasury stock method.
 
2019
 
2018
 
2017
Basic
 
 
 
 
 
     Average shares outstanding
91,803,528

 
92,992,457

 
92,908,638

 
 
 
 
 
 
     Net income:
 
 
 
 
 
Continuing operations
$
1,541.3

 
$
1,108.7

 
$
1,769.5

Discontinued operations


 


 
(41.6
)
Net income
$
1,541.3

 
$
1,108.7

 
$
1,727.9

 
 
 
 
 
 
Basic net income per share:
 
 
 
 
 
Continuing operations
$
16.79

 
$
11.92

 
$
19.04

Discontinued operations


 


 
(0.44
)
Net income per share
$
16.79

 
$
11.92

 
$
18.60

 
 
 
 
 
 
Diluted
 
 
 
 
 
Average shares outstanding
91,803,528

 
92,992,457

 
92,908,638

Stock options and other contingently issuable shares (1)
1,601,213

 
1,938,586

 
1,931,157

Non-vested restricted stock grants
42,101

 
57,027

 
87,418

Average shares outstanding assuming dilution
93,446,842

 
94,988,070

 
94,927,213

 
 
 
 
 
 
Net income:
 
 
 
 
 
Continuing operations
$
1,541.3

 
$
1,108.7

 
$
1,769.5

Discontinued operations


 


 
(41.6
)
Net income
$
1,541.3

 
$
1,108.7

 
$
1,727.9

 
 
 
 
 
 
Diluted net income per share:
 
 
 
 
 
Continuing operations
$
16.49

 
$
11.67

 
$
18.64

Discontinued operations


 


 
(0.44
)
Net income per share
$
16.49

 
$
11.67

 
$
18.20

(1) 
Stock options and other contingently issuable shares excludes 449,167, 28,321 and 638,795 shares at December 31, 2019, 2018 and 2017, respectively, due to their anti-dilutive effect.