Derivative and Hedging Activities - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Interest income	$ 1,289	$ 1,100	$ 957
Gain (losses) on interest rate derivatives designated as cash flow hedge	25
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	25
Interest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	2,250	2,250
Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	2,000
Interest income	49	$ 35
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	2,000
LCH | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	$ 4,300