XML 79 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1

Inventories - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventory [Line Items]
Reduction to inventory recorded	$ 438
BMS & Gilead Sciences, LLC Joint Venture [Member] | Efavirenz [Member]
Inventory [Line Items]
Efavirenz Inventory Valued at Estimated Net Selling Price	$ 137	$ 1,100

X

- Definition

Efavirenz Inventory Valued at BMS's Estimated Net Selling Price

+ References

No definition available.

+ Details

Name:	gild_EfavirenzInventoryValuedatEstimatedNetSellingPrice
Namespace Prefix:	gild_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Reduction of inventory as a result of the termination and pursuant to the terms of the existing agreements governing the joint venture between BMS and Gilead

+ References

No definition available.

+ Details

Name:	gild_ReductiontoInventoryFromTerminationAgreement
Namespace Prefix:	gild_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

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

X

- Details

Name:	gild_VariableInterestEntitiesByNameOfVariableInterestEntityAxis=gild_BMSGileadSciencesLLCJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=gild_EfavirenzMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: