Loss Contingency, Material Transfer Agreements, Number

No definition available.

Name:	gild_LossContingencyMaterialTransferAgreementsNumber
Namespace Prefix:	gild_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Number Of Patents

+ References

No definition available.

+ Details

Name:	gild_LossContingencyNumberOfPatents
Namespace Prefix:	gild_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Parties Appealed, Number

+ References

No definition available.

+ Details

Name:	gild_LossContingencyPartiesAppealedNumber
Namespace Prefix:	gild_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

+ Details

Name:	us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_LitigationCaseAxis=gild_PreExposureProphylaxisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=gild_EuropeanPatentClaims2032ExpirationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=gild_ProductLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES (Details)	1 Months Ended	3 Months Ended
COMMITMENTS AND CONTINGENCIES (Details)	Mar. 31, 2022 patent	Mar. 31, 2023 plaintiff lawsuit	Apr. 30, 2020 agreement	Dec. 31, 2019 opposingParty
Loss Contingencies [Line Items]
Number of patents challenged	3
Number of patents	5
Pre-Exposure Prophylaxis
Loss Contingencies [Line Items]
Number of material transfer agreements \| agreement			3
European Patent Claims 2032 Expiration
Loss Contingencies [Line Items]
Number of parties appealed \| opposingParty				3
Product Liability
Loss Contingencies [Line Items]
Number of class action lawsuits \| lawsuit		1
Number of plaintiffs involved \| plaintiff		25,000