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17. Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Data [Abstract]  
Schedule of Quarterly Financial Data [Table Text Block]

 
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
2019
 
 
 
 
 
 
 
 
Net sales
 
$
554.0

 
$
572.6

 
$
560.6

 
$
624.5

Gross profit
 
311.8

 
307.8

 
307.0

 
330.4

Net income (loss)
 
865.2

 
598.8

 
(258.8
)
 
553.5

Basic earnings (loss) per share
 
$
29.03

 
$
20.08

 
$
(8.68
)
 
$
18.50

Diluted earnings (loss) per share
 
$
28.74

 
$
19.86

 
$
(8.68
)
 
$
18.31

 
 
 
 
 
 
 
 
 
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
)