Borrowings - Schedule of Short-term Borrowings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Securities sold under customer repurchase agreements	$ 509	$ 436
Notes payable to FHLB of Atlanta at overnight SOFR plus 0.28%.	500	1,750
Total short-term borrowings	$ 1,009	$ 2,186
Short-Term Notes Payable | Secured Overnight Financing Rate (SOFR)
Short-term Debt [Line Items]
Basis spread on variable rate	0.28%