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RELATED PARTIES (Tables)
 12 Months Ended
Dec. 31, 2015
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, 2015:
Mine
 
Cliffs Natural Resources
 
ArcelorMittal
 
U.S. Steel
Empire
 
79.0
%
 
21.0
%
 
—

Tilden
 
85.0
%
 
—

 
15.0
%
Hibbing
 
23.0
%
 
62.3
%
 
14.7
%
Summary Of Related Party Transactions Table Disclosure
Product revenues from related parties were as follows:
 
(In Millions)
 
Year Ended December 31,
 
2015
 
2014
 
2013
Product revenues from related parties
$
671.1

 
$
1,011.4

 
$
1,038.8

Total product revenues
1,832.4

 
3,095.2

 
3,631.8

Related party product revenue as a percent of total product revenue
36.6
%
 
32.7
%
 
28.6
%