Income Taxes - Summary of Reconciliation of U.S. Federal Statutory Income Tax Rate to Effective Income Tax Rate - Graphite Bio, Inc. (Details) - Graphite Bio, Inc.	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
IncomeTaxesTable [Line Items]
Federal statutory income tax rate ate	21.00%	21.00%
State taxes	1.01%	1.10%
Others	(0.06%)	(0.69%)
Research and development credits	1.00%	1.11%
Transaction costs	(0.0101)	0
Lease Modification	0.0327	0
Interest expense	0.00%	0.00%
Stock-based compensation	(1.52%)	(0.97%)
Change in valuation allowance	(23.69%)	(21.55%)
Provision for taxes	0.00%	0.00%

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Effective Income Tax Rate Reconciliation Lease Modification

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Income Taxes Table

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
-Section S99
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-Topic 740
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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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