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Disclosure - Financial Instruments - Marketable Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Financial Instruments - Contractual Maturity Date of Marketable Debt Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Financial Instruments - Gross Unrealized Losses and Fair Values for Investments in Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Financial Instruments - Gains and Losses on Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Financial Instruments - Carrying Amount of Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Financial Instruments - Carrying Amount of Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - 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Long-Lived Assets by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Schedule II: Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink