Income Taxes, Tax Credit Carryforwards (Details) $ in Millions	Dec. 31, 2024 USD ($)
Research and Development [Member] \| Federal [Member]
Tax Credit Carryforwards [Abstract]
Tax credit carryforwards	$ 234.2
Research and Development [Member] \| California [Member]
Tax Credit Carryforwards [Abstract]
Tax credit carryforwards	137.6
Federal [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss carryforwards	290.2
State [Member]
Operating Loss Carryforwards [Abstract]
Net operating loss carryforwards	$ 526.9

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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