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Products and Services Revenues (Tables)
 6 Months Ended
Jun. 30, 2016
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,
 
2016
 
2015
 
2016
 
2015
 
(Dollars in millions)
Strategic services
$
674

 
650

 
1,345

 
1,291

Legacy services
814

 
904

 
1,658

 
1,833

Affiliates and other services
735

 
668

 
1,473

 
1,315

Total operating revenues
$
2,223

 
2,222

 
4,476

 
4,439