Derivatives and Hedging Activities - Derivatives Summary (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative, gross, assets	$ 209	$ 1,006
Derivatives, gross, liabilities	530	131
Derivative asset and derivative liability netting, assets	(150)	(91)
Derivative asset and derivative liability netting, liabilities	(150)	(91)
Cash collateral netting, assets	0	(18)
Cash collateral netting, liabilities	(22)	(23)
Total derivatives assets, net	59	897
Total derivatives liabilities, net	358	17
Other Assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, gross, assets	38	340
Other Assets | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, gross, assets	0	0
Other Assets | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, gross, assets	38	340
Other Assets | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, gross, assets	171	666
Other Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, gross, liabilities	222	41
Other Liabilities | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, gross, liabilities	17	23
Other Liabilities | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, gross, liabilities	205	18
Other Liabilities | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivatives, gross, liabilities	$ 308	$ 90