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, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Unrecognized tax benefits at January 1	$ 100	$ 65	$ 55
Gross increases for tax positions taken during prior period	10	29	25
Gross decreases for tax positions taken during prior period	(4)	(3)	(3)
Gross increases for tax positions taken during current period	11	12	6
Settlements with taxing authorities	0	(1)	(9)
Lapse of applicable statute of limitations	(15)	(2)	(9)
Unrecognized tax benefits at December 31	$ 102	100	65
Unrecognized tax benefits that would impact effective tax rate		$ 6	$ 6