Investment Securities (Details 2) $ in Millions	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Number of securities, less than 12 months | security	96	5
Estimated fair value, less than 12 months	$ 4,361	$ 477
Gross unrealized losses, less than 12 months	$ (89)	$ (1)
Number of securities, 12 months or more | security	1	0
Estimated fair value, 12 months or more	$ 48	$ 0
Gross unrealized losses, more than 12 months	$ (2)	$ 0
Number of securities, total | security	97	5
Estimated fair value, total	$ 4,409	$ 477
Gross unrealized losses, total	$ (91)	$ (1)
90–100%
Debt Securities, Available-for-sale [Line Items]
Number of securities, less than 12 months | security	84	5
Estimated fair value, less than 12 months	$ 4,333	$ 477
Gross unrealized losses, less than 12 months	$ (79)	$ (1)
Number of securities, 12 months or more | security	1	0
Estimated fair value, 12 months or more	$ 48	$ 0
Gross unrealized losses, more than 12 months	$ (2)	$ 0
Number of securities, total | security	85	5
Estimated fair value, total	$ 4,381	$ 477
Gross unrealized losses, total	$ (81)	$ (1)
Less than 90%
Debt Securities, Available-for-sale [Line Items]
Number of securities, less than 12 months | security	12	0
Estimated fair value, less than 12 months	$ 28	$ 0
Gross unrealized losses, less than 12 months	$ (10)	$ 0
Number of securities, 12 months or more | security	0	0
Estimated fair value, 12 months or more	$ 0	$ 0
Gross unrealized losses, more than 12 months	$ 0	$ 0
Number of securities, total | security	12	0
Estimated fair value, total	$ 28	$ 0
Gross unrealized losses, total	$ (10)	$ 0