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Derivative Financial Instruments - OTC cash and securities collateral pledged (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Pledged by the Company $ 11  
Pledged to the Company 3  
Collateral posted under MNAs for contracts containing credit-risk contingent features $ 11 $ 10