Borrowings - Schedule of Short-term Borrowings (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Securities sold under customer repurchase agreements	$ 578	$ 589
Notes payable to FHLB of Atlanta at overnight SOFR plus spreads ranging from to	2,550	0
Total short-term borrowings	$ 3,128	$ 589
Minimum | Short-Term Notes Payable | Secured Overnight Financing Rate (SOFR)
Short-term Debt [Line Items]
Basis spread on variable rate	0.18%
Maximum | Short-Term Notes Payable | Secured Overnight Financing Rate (SOFR)
Short-term Debt [Line Items]
Basis spread on variable rate		0.20%