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Commitments and Contingencies - Credit Extension Commitments Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]    
Legally binding unfunded commitments syndicated $ 10,400 $ 10,400
Credit extension commitments, carrying value 1,400 1,600
Notional amount of credit extension commitments under fair value option 2,600 3,000
Unfunded loan commitments    
Other Commitments [Line Items]    
Fair value carrying amount, liabilities $ 75 $ 110