Commitment and Contingencies - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Fair Value	$ 9,159	$ 9,074
Loans and leases held for investment, net of deferred loan fees and costs	84,619	69,001
Asset pledged as collateral
Other Commitments [Line Items]
Fair Value	2,800	434
Loans and leases held for investment, net of deferred loan fees and costs	$ 43,100	$ 44,500