Products and Services Revenues (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 item	Jun. 30, 2012
Products and Services Revenues
Number of categories of products and services revenues			4
Number of reportable segments			1
Products and Services Revenues
Total operating revenues	$ 2,840	$ 2,836	$ 5,636	$ 5,675
USF and surcharges included in operating revenues and expenses	92	103	188	203
Strategic services
Products and Services Revenues
Total operating revenues	1,295	1,235	2,573	2,457
Legacy services
Products and Services Revenues
Total operating revenues	1,132	1,227	2,282	2,484
Data integration
Products and Services Revenues
Total operating revenues	137	140	247	256
Affiliates and other services
Products and Services Revenues
Total operating revenues	$ 276	$ 234	$ 534	$ 478

Represents the number of categories in which the entity categorizes the products and services.

No definition available.

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- Definition

Represents the taxes and surcharges on revenues from universal service funds (USF), which are included in operating revenues and expenses.

+ References

No definition available.

+ Details

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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- Definition

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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