Investment Securities - Additional Information (Details) - USD ($) $ in Millions		Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Available-for-sale securities	[1]	$ 72,426	$ 69,706
Allowance for credit loss on held-to-maturity securities		0
Asset Pledged as Collateral
Debt Securities, Available-for-Sale [Line Items]
Available-for-sale securities		21,600	20,500
Asset Pledged as Collateral with Right
Debt Securities, Available-for-Sale [Line Items]
Available-for-sale securities		$ 356	$ 338

[1] Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.