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Gain (loss) on sales or impairment of long lived assets (Tables)
 12 Months Ended
Dec. 31, 2016
GAIN (LOSS) ON SALE OF AND IMPAIRMENT OF LONG-LIVED ASSETS, NET [Abstract]  
gain or loss on sale or impairment on assets [Table Text Block]
The major components of “Gain (Loss) on sale or impairment of long-lived assets” in the Consolidated Statements of Income for the years ended December 31 are reflected in the table below and are described in the paragraphs following the table:
Dollar amounts in millions
Year ended December 31,
2016
 
2015
 
2014
Impairment charges on long-lived assets
$
(0.8
)
 
$
(1.5
)
 
$
—

Gain (loss) on sale or other disposition of other long-lived assets
9.2

 
(0.6
)
 
3.1

 
$
8.4

 
$
(2.1
)
 
$
3.1