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Gain (loss) on sales or impairment of long lived assets (Tables)
 12 Months Ended
Dec. 31, 2018
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,
2018
 
2017
 
2016
Impairment charges on long-lived assets
$
(10.7
)
 
$
(9.1
)
 
$
(0.8
)
Gain (loss) on sale or other disposition of other long-lived assets
(0.1
)
 
2.3

 
9.2

 
$
(10.8
)
 
$
(6.8
)
 
$
8.4