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Guarantees and Indemnifications (Tables)
 12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
The activity in warranty reserves for the last three years is summarized in the following table.
 
  
Year ended December 31,
Dollar amounts in millions
2012
 
2011
 
2010
Beginning balance
$
30.3

 
$
29.5

 
$
32.9

Accrued to expense during the year
4.5

 
13.7

 
11.2

Credited to other operating credits and charges
(1.8
)
 
—

 
—

Payments made
(11.6
)
 
(12.9
)
 
(14.6
)
Total warranty reserves
21.4

 
30.3

 
29.5

Current portion
(12.0
)
 
(12.0
)
 
(10.0
)
Long term portion
$
9.4

 
$
18.3

 
$
19.5