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Financial Instruments - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
security
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
security
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
security
Investments, Debt and Equity Securities [Abstract]          
Impairment charges $ 0 $ 0 $ 0 $ 0  
Credit losses related allowance $ 0   $ 0   $ 0
Number of AFS securities in loss positions | security 341   341   392
Net gains (losses) on equity investments $ (22,000,000) $ 36,000,000 $ (35,000,000) $ 17,000,000  
Equity securities without readily determinable fair value, amount $ 42,000,000   $ 42,000,000   $ 42,000,000