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Discontinued Operations (Tables)
 6 Months Ended
Jun. 30, 2018
Discontinued Operations [Abstract]  
Summarized Financial Information For Discontinued Operations Text Block [Table Text Block]
The components of Discontinued operations, net of tax for the three and six months ended June 30 were as follows:
 
Three months ended
 
Six months ended
In millions
2018
 
2017
 
2018
 
2017
Pre-tax earnings (loss) from discontinued operations
$
(8.6
)
 
$
10.0

 
$
(20.7
)
 
$
0.9

Tax benefit (expense)
2.7

 
(1.7
)
 
5.4

 
0.9

Discontinued operations, net of tax
$
(5.9
)
 
$
8.3

 
$
(15.3
)
 
$
1.8