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16. Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Data [Abstract]  
Schedule of Quarterly Financial Data [Table Text Block]

 
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
2018
 
 
 
 
 
 
 
 
Net sales
 
$
551.5

 
$
575.9

 
$
545.1

 
$
616.9

Gross profit
 
302.2

 
301.7

 
286.7

 
332.6

Net income (loss)
 
656.8

 
268.0

 
269.3

 
(828.5
)
Basic earnings (loss) per share
 
$
22.05

 
$
8.99

 
$
9.02

 
$
(27.73
)
Diluted earnings (loss) per share
 
$
21.77

 
$
8.87

 
$
8.89

 
$
(27.73
)
 
 
 
 
 
 
 
 
 
2017
 
 
 
 
 
 
 
 
Net sales
 
$
500.1

 
$
504.7

 
$
534.1

 
$
621.3

Gross profit
 
270.1

 
273.4

 
299.0

 
345.2

Net income
 
12.4

 
5.0

 
22.1

 
82.7

Basic earnings per share
 
$
0.42

 
$
0.17

 
$
0.74

 
$
2.78

Diluted earnings per share
 
$
0.41

 
$
0.17

 
$
0.73

 
$
2.75