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Contingency Reserves (Tables)
 6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Loss Contingencies by Contingency [Table Text Block]
LP maintains reserves for various contingent liabilities as follows: 
Dollar amounts in millions
June 30, 2013
 
December 31, 2012
Environmental reserves
$
13.8

 
$
14.1

Other reserves
0.5

 
0.7

Total contingency reserves
14.3

 
14.8

Current portion of contingency reserves
(2.0
)
 
(2.0
)
Long-term portion of contingency reserves
$
12.3

 
$
12.8