Property and Equipment Net (Parenthetical) (Detail) (Computers and Equipment, USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Computers and Equipment
Property, Plant and Equipment [Line Items]
Capital lease	$ 44	$ 37
Accumulated depreciation related to the capital lease	33	20
Accumulation amortization related to the capital lease	$ 12	$ 6

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 2)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Amortization.

+ References

No definition available.

+ Details

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Namespace Prefix:	yhoo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant