Income Taxes (Summary of Operating and Capital Loss Carryforwards) (Details) $ in Millions	Sep. 30, 2025 USD ($)
U.S. State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 207.2
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	371.1
Capital loss carryforwards	$ 208.4

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

No definition available.

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- Definition

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

+ References

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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- Definition

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

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