Credit Quality and the Allowance for Loan and Lease Losses - Summary of the Bancorp's Nonaccrual Loans and Leases by Class (Details) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Modifications
With an ALLL		$ 464	$ 333
No Related ALLL		197	206
Total		661	539
Loans and leases held for sale	[1]	760	1,007
Total portfolio loans and leases	[2],[3]	121,891	121,480
Nonperforming
Financing Receivable, Modifications
Loans and leases held for sale		2	0
Nonperforming | Government Insured
Financing Receivable, Modifications
Total portfolio loans and leases		18	15
Commercial
Financing Receivable, Modifications
With an ALLL		313	149
No Related ALLL		32	114
Total		345	263
Total portfolio loans and leases		76,352	76,389
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
With an ALLL		303	114
No Related ALLL		19	101
Total		322	215
Loans and leases held for sale		29	73
Total portfolio loans and leases		56,897	57,232
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
With an ALLL		10	9
No Related ALLL		10	7
Total		20	16
Total portfolio loans and leases		5,434	5,258
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
With an ALLL		0	20
No Related ALLL		2	4
Total		2	24
Total portfolio loans and leases		5,876	5,762
Commercial | Commercial construction loans
Financing Receivable, Modifications
With an ALLL		0	6
No Related ALLL		0	2
Total		0	8
Total portfolio loans and leases		5,475	5,433
Commercial | Commercial leases
Financing Receivable, Modifications
With an ALLL		0	0
No Related ALLL		1	0
Total		1	0
Loans and leases held for sale		3	0
Total portfolio loans and leases		2,670	2,704
Residential Mortgage
Financing Receivable, Modifications
With an ALLL		46	81
No Related ALLL		91	43
Total		137	124
Consumer
Financing Receivable, Modifications
With an ALLL		105	103
No Related ALLL		42	25
Total		147	128
Consumer | Home equity
Financing Receivable, Modifications
With an ALLL		21	45
No Related ALLL		40	22
Total		61	67
Total portfolio loans and leases		3,911	4,039
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		61	67
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
With an ALLL		21	26
No Related ALLL		2	3
Total		23	29
Total portfolio loans and leases		16,097	16,552
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		23	29
Consumer | Credit card
Financing Receivable, Modifications
With an ALLL		30	27
No Related ALLL		0	0
Total		30	27
Total portfolio loans and leases		1,818	1,874
Consumer | Credit card | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		30	27
Consumer | Other consumer loans
Financing Receivable, Modifications
With an ALLL		33	5
No Related ALLL		0	0
Total		33	5
Total portfolio loans and leases		6,210	4,998
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		33	5
Nonaccrual Portfolio Loans and Leases
Financing Receivable, Modifications
With an ALLL		464	333
No Related ALLL		165	182
Total		629	515
OREO and Other Repossessed Assets
Financing Receivable, Modifications
With an ALLL		0	0
No Related ALLL		32	24
Total		$ 32	$ 24

[1] Includes $596 and $600 of residential mortgage loans held for sale measured at fair value at June 30, 2023 and December 31, 2022, respectively.

[2] Includes $1 and $17 of other short-term investments, $42 and $185 of portfolio loans and leases, $(1) and $(2) of ALLL, $0 and $2 of other assets, $9 and $9 of other liabilities, and $37 and $118 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2023 and December 31, 2022, respectively. For further information, refer to Note 11.

[3] Includes $124 and $123 of residential mortgage loans measured at fair value at June 30, 2023 and December 31, 2022, respectively.