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Products and Services Revenues (Tables)
 6 Months Ended
Jun. 30, 2015
Segment Reporting [Abstract]  
Schedule of operating revenues by products and services
Our operating revenues for our products and services consisted of the following categories:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
 
(Dollars in millions)
Strategic services
$
859

 
860

 
1,717

 
1,716

Legacy services
695

 
757

 
1,407

 
1,524

Affiliates and other services
668

 
589

 
1,315

 
1,177

Total operating revenues
$
2,222

 
2,206

 
4,439

 
4,417