Income Taxes - Reconciliation of the Beginning and Ending Amounts of the Bancorp's Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at January 1	$ 94	$ 102	$ 100
Gross increases for tax positions taken during prior period	14	3	10
Gross decreases for tax positions taken during prior period	(5)	(5)	(4)
Gross increases for tax positions taken during current period	15	11	11
Settlements with taxing authorities	(1)	0	0
Lapse of applicable statute of limitations	(20)	(17)	(15)
Unrecognized tax benefits at December 31	$ 97	$ 94	$ 102