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v3.19.2

Subsequent Event (Details) - 1 months ended Jul. 31, 2019 - Subsequent Event [Member] $ in Millions | USD ($) | EUR (€)
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Galapagos Collaboration Agreement [Member] |  |
Subsequent Event [Line Items] |  |
Up-front license and option fee payment upon closing of collaboration agreement | $ 3,950 |
Estimated equity investment upon closing of the subscription agreement | 1,100 |
Potential Milestone Payment Upon Marketing Approval of GLPG-1972 | 325 |
Potential Option Exercise Fee for GLPG-1972 | 250 |
Potential Milestone for GLPG-1972 after Option Exercise | 750 |
Potential Option Exercise Fee Per Program | $ 150 |
Galapagos Collaboration Agreement [Member] | Minimum [Member] |  |
Subsequent Event [Line Items] |  |
Potential Sales Based Tiered Royalties | 20.00% | 20.00%
Galapagos Collaboration Agreement [Member] | Maximum [Member] |  |
Subsequent Event [Line Items] |  |
Potential Sales Based Tiered Royalties | 24.00% | 24.00%
Galapagos Subscription Agreement [Member] |  |
Subsequent Event [Line Items] |  |
Potential Ownership Percentage in Galapagos Upon Closing of the Subscription Agreement | 20.10% | 20.10%
Potential Subscription Price | € |  | € 140.59
Potential Ownership Percentage in Galapagos Upon Warrant Exercises | 29.90% | 29.90%
Standstill Restricting Term | 10 years | 10 years
Maximum Ownership Percentage in Galapagos Based on the Terms of the Subscription Agreement | 29.90% | 29.90%
Minimum Ownership Percentage in Galapagos Based on the Terms of the Subscription Agreement | 20.10% | 20.10%

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- Definition Estimated equity investment upon closing of the subscription agreement + References No definition available. + Details
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- Definition Maximum Ownership Percentage in Galapagos Based on the Terms of the Subscription Agreement + References No definition available. + Details
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- Definition Minimum Ownership Percentage in Galapagos Based on the Terms of the Subscription Agreement + References No definition available. + Details
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- Definition Potential Milestone Payment Upon Marketing Approval of GLPG-1972 + References No definition available. + Details
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- Definition Potential Milestone for GLPG-1972 after Option Exercise + References No definition available. + Details
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- Definition Potential Option Exercise Fee Per Program + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Potential Option Exercise Fee for GLPG-1972 + References No definition available. + Details
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- Definition Potential Ownership Percentage in Galapagos Upon Closing of the Subscription Agreement + References No definition available. + Details
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- Definition Potential Ownership Percentage in Galapagos Upon Warrant Exercises + References No definition available. + Details
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- Definition Potential Sales Based Tiered Royalties + References No definition available. + Details
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- Definition Potential Subscription Price + References No definition available. + Details
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Balance Type: | debit
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- Definition Standstill Restricting Term + References No definition available. + Details
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Namespace Prefix: | gild_
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Balance Type: | na
Period Type: | duration

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- Definition Up-front license and option fee payment upon closing of collaboration agreement + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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