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Financial Instruments and Fair Value Measurements - Narrative (Details)
12 Months Ended
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
Investments, Debt and Equity Securities [Abstract]      
Impairment charges $ 0 $ 0 $ 0
Credit losses related allowance $ 0 $ 0  
Number of AFS securities in loss positions | security 108 252  
Net losses $ 8,000,000 $ 52,000,000 $ 35,000,000