Derivatives and Hedging Activities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets, gross	$ 78	$ 49
Total fair value of derivative liabilities, gross	45	284
Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset and derivative liability netting, other assets	(22)	(15)
Total derivative assets, net	56	34
Other Assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets, gross	34	1
Other Assets | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets, gross	34	1
Other Assets | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets, gross	44	48
Other Assets | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative assets, gross	0	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative asset and derivative liability netting, other liabilities	(22)	(15)
Total derivative liabilities, net	23	269
Other Liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities, gross	8	195
Other Liabilities | Foreign Exchange Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities, gross	8	195
Other Liabilities | Foreign Exchange Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities, gross	37	89
Other Liabilities | Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total fair value of derivative liabilities, gross	$ 0	$ 0