Commitments, Contingencies, Guarantees and Others - Other Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2022
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 200
FDIC Special Assessment
Loss Contingencies [Line Items]
Operating expenses	42	$ 289
Loss Contingency Accrual	331
Loss contingency, estimate of possible loss	$ 200