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Equity Securities with Readily Determinable Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Marketable Debt and Equity Securities - Net Realized and Unrealized (Losses) Gains on Marketable Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Balance Sheet Accounts - Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Balance Sheet Accounts - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Balance Sheet Accounts - Indefinite and Finite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Balance Sheet Accounts - Finite-Lived Intangible Assets, Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - 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