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Products and Services Revenues (Tables) | 12 Months Ended
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Dec. 31, 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 for the years ended December 31, 2015, 2014 and 2013:
| Years Ended December 31,
| 2015 |  | 2014 |  | 2013
| (Dollars in millions)
Strategic services | $ | 3,433 |  |  | 3,429 |  |  | 3,342 |
Legacy services | 2,777 |  |  | 2,987 |  |  | 3,208 |
Affiliates and other services | 2,754 |  |  | 2,422 |  |  | 2,203 |
Total operating revenues | $ | 8,964 |  |  | 8,838 |  |  | 8,753 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9031-108599 + Details
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