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Lines of Credit and Term Loans - Mega Bank Narrative (Details) - Mega Bank $ in Millions, $ in Millions	Jun. 24, 2025 TWD ($)	Apr. 17, 2024 USD ($)	Sep. 13, 2021 TWD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Apr. 17, 2024 TWD ($)	Apr. 16, 2024 USD ($)
Revolving Credit Facility | Mega Bank Credit Lines | Line of credit
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 600.0	$ 50.0				$ 1,200.0	$ 20.0
Credit facility, term		120 days
Deposit needs requirement, percentage	100.00%
Amount of actual drawdown exceeding limit	$ 30.0
Line of credit				$ 0.0	$ 50.0
Credit facility, remaining borrowing capacity				50.0
Revolving Credit Facility | Mega Bank Credit Lines | Line of credit | Taiwan Subsidiary
Short-term Debt [Line Items]
Debt covenant, subsidiary ownership percentage, parent	100.00%	100.00%				100.00%
Secured debt | Mega Bank Term Loan Facility, due October 3, 2026 | Term Loan
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity			$ 1,200.0	$ 17.1	$ 27.6
Drawdowns percentage (as a percent)			80.00%
Principal payment deferment period After first drawdown			2 years
Principal payments period			3 years

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Debt Instrument, Principal Payments Period

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Drawdowns Percentage

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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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.

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