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Acquisition Accounting Components of Intangible Assets (Details) (Super Media, Inc., USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 30, 2013	Apr. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets	$ 635	$ 635
Directory services agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets		145
Estimated Remaining Useful Lives	5 years
Client relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets		420
Estimated Remaining Useful Lives	3 years
Trademarks and domain names
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets		60
Estimated Remaining Useful Lives	5 years
Patented technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value of intangible assets		$ 10
Estimated Remaining Useful Lives	4 years

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464

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