Derivatives and Hedging Activities - Derivatives Summary (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	$ 1,006	$ 80
Total derivative liabilities, gross	131	977
Derivative asset and derivative liability netting, assets	(91)	(57)
Derivative asset and derivative liability netting, liabilities	(91)	(57)
Cash collateral netting, assets	(18)	0
Cash collateral netting, liabilities	(23)	(106)
Total derivatives assets, net	897	23
Total derivatives liabilities, net	$ 17	$ 814
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	$ 340	$ 9
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	340	9
Other Assets | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	666	71
Other Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	41	554
Other Liabilities | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	23	99
Other Liabilities | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	18	455
Other Liabilities | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	$ 90	$ 423