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Supplementary Data Other Expense, Net (Tables)
 12 Months Ended
Dec. 31, 2017
Other Nonoperating Income (Expense) [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Other Expense, net
Results of operations include certain items that are not directly associated with our revenue-producing operations.
 
Years ended December 31,
 
2017
 
2016
 
2015
Net losses on sales of businesses
$
(24.1
)
 
$
(41.4
)
 
$
(50.0
)
Other
(2.1
)
 
1.1

 
0.4

Total other expense, net
$
(26.2
)
 
$
(40.3
)
 
$
(49.6
)