2.2.0.25truefalse40501 - Disclosure - Acquisition of Arresto Biosciences, Inc. (Details)truefalseIn Millionsfalse1falsefalseUSDtruefalse{us-gaap_BusinessAcquisitionAxis} : Arresto Biosciences, Inc. [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010_us-gaap_BusinessAcquisitionAxis_gild_ArrestoBiosciencesIncMemberhttp://www.sec.gov/CIK0000882095instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseArresto Biosciences, Inc. [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldigild_ArrestoBiosciencesIncMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false0gild_BusinessCombinationConsiderationTransferredPreliminarygildfalsecreditinstantPreliminary fair value of consideration transferred pending completion of valuations pertaining to IPR&D and related...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse225000000225falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryPreliminary fair value of consideration transferred pending completion of valuations pertaining to IPR&D and related contingent consideration.No authoritative reference available.falsefalse11Acquisition of Arresto Biosciences, Inc. (Details) (Arresto Biosciences, Inc. [Member], USD $)MillionsUnKnownUnKnownUnKnownfalsetrue