Derivatives and Hedging Activities - Derivatives Summary (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	$ 174	$ 1,006
Total derivative liabilities, gross	1,120	131
Derivative asset and derivative liability netting, assets	(151)	(91)
Derivative asset and derivative liability netting, liabilities	(151)	(91)
Cash collateral netting, assets	(1)	(18)
Cash collateral netting, liabilities	(9)	(23)
Total derivatives assets, net	22	897
Total derivatives liabilities, net	$ 961	$ 17
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Other Assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	$ 26	$ 340
Other Assets | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	0	0
Other Assets | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	26	340
Other Assets | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	148	666
Other Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	702	41
Other Liabilities | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	4	23
Other Liabilities | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	699	18
Other Liabilities | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	$ 418	$ 90