Derivative and Hedging Activities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Interest income	$ 326	$ 318	$ 1,017	$ 967
Gain (losses) on interest rate derivatives designated as cash flow hedge			4
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months, net	21		21
Interest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	1,500		1,500		$ 2,250
Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	0		0
Interest income		$ 12	6	$ 37
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	2,000		$ 2,000
Derivative, expired period			2022-02
LCH | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	$ 1,500		$ 1,500