Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	$ 590	$ 629
Total derivative liabilities, gross	139	702
Derivative asset and derivative liability netting, assets	(93)	(98)
Derivative asset and derivative liability netting, liabilities	(93)	(98)
Cash collateral netting, assets	(204)	(500)
Cash collateral netting, liabilities	(4)	(16)
Total derivatives assets, net	293	31
Total derivatives liabilities, net	42	588
Other Assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	423	524
Other Assets | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	204	500
Other Assets | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	219	24
Other Assets | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative assets, gross	167	105
Other Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	54	474
Other Liabilities | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	0	0
Other Liabilities | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	54	474
Other Liabilities | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivative liabilities, gross	$ 85	$ 228