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RELATED PARTIES (Tables)
 12 Months Ended
Dec. 31, 2014
Related Party Transactions [Abstract]  
Summary Of Other Ownership Interests
The following is a summary of the mine ownership of these iron ore mines at December 31, 2014:
Mine
 
Cliffs Natural Resources
 
ArcelorMittal
 
U.S. Steel Canada
 
WISCO
Empire
 
79.0
%
 
21.0
%
 
—

 
—

Tilden
 
85.0
%
 
—

 
15.0
%
 
—

Hibbing
 
23.0
%
 
62.3
%
 
14.7
%
 
—

Bloom Lake
 
82.8
%
 
—

 
—

 
17.2
%
Summary Of Related Party Transactions Table Disclosure
Product revenues from related parties were as follows:
 
(In Millions)
 
Year Ended December 31,
 
2014
 
2013
 
2012
Product revenues from related parties
$
1,378.7

 
$
1,664.8

 
$
1,660.8

Total product revenues
4,230.8

 
5,346.6

 
5,520.9

Related party product revenue as a percent of total product revenue
32.6
%
 
31.1
%
 
30.1
%