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INVESTMENTS-AFFILIATED COMPANIES (Tables)
 12 Months Ended
Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]  
Investment in non-consolidated equity affiliates
 
December 31,
 
2014
 
2013
 
($ in millions)
Bay Gas
$
23.3

 
$
21.6
Summary of equity earnings of non-consolidated affiliates
The following table summarizes our equity earnings of non-consolidated affiliates:

 
Years Ended December 31,
 
2014
 
2013
 
2012
 
($ in millions)
Bay Gas
$
1.7

 
$
2.1

 
$
2.4

Bleach joint venture
—

 
0.7

 
0.6

Equity earnings of non-consolidated affiliates
$
1.7

 
$
2.8

 
$
3.0