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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Feb. 28, 2023	Aug. 31, 2022	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Renewal term			5 years
Lease expiration date			Apr. 30, 2030
Lease option to extend			contains an option to extend the lease
Lessee, Operating Lease, Existence of Option to Extend [true false]			true
Lease option to termination			along with termination options
Lessee, Operating Lease, Existence of Option to Terminate [true false]			true
Purchase commitment due in the next year			$ 9.7
South San Francisco
Lessee, Lease, Description [Line Items]
Percentage of headquarters subleased space	25.00%	25.00%
Lessor, operating lease, term of contract	77 months	39 months
Lessor, operating lease, remaining term of contract			24 months
Lessor, operating lease, sublease income expected	$ 9.1	$ 4.8
Corporate Headquarters (18th Floor) | South San Francisco
Lessee, Lease, Description [Line Items]
Lessor, operating lease, sublease income expected			$ 2.9
Corporate Headquarters (21st Floor)
Lessee, Lease, Description [Line Items]
Lessor, operating lease, sublease income expected			$ 9.0
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term			1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term			6 years

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Lessee, Operating Lease, Remaining Term Of Contract

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Lessor, operating lease, percentage of headquarters subleased.

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Lessor, Operating Lease, Remaining Term Of Contract1

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Lessor, Operating Lease, Sublease Income Expected

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Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Indicates (true false) whether lessee has option to extend operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Indicates (true false) whether lessee has option to terminate operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Description of terms and conditions of option to terminate lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479773/842-30-50-3

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Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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