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Investment in MiNK Therapeutics, Inc. (Narrative) (Details) - MiNK Therapeutics, Inc. - USD ($)
$ in Millions
Jun. 30, 2026
Jul. 31, 2025
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 43.00% 50.00%
Fair value of equity investment $ 25.5  
Investment and receivable balance from related parties $ 41.5  
Investment percentage of asset balance 20.00%