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, 2022	Dec. 31, 2021
Financing Receivable, Modifications
With an ALLL		$ 350	$ 304
No Related ALLL		209	223
Total		559	527
Loans and leases held for sale	[1]	2,542	4,415
Total portfolio loans and leases	[2],[3]	118,823	112,050
Nonperforming
Financing Receivable, Modifications
Loans and leases held for sale		0	15
Nonperforming | Government Insured
Financing Receivable, Modifications
Total portfolio loans and leases		15	26
Restructured nonaccrual loans and leases		9	11
Commercial
Financing Receivable, Modifications
With an ALLL		200	192
No Related ALLL		119	145
Total		319	337
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
With an ALLL		164	151
No Related ALLL		104	128
Total		268	279
Loans and leases held for sale		3	7
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
With an ALLL		10	10
No Related ALLL		10	13
Total		20	23
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
With an ALLL		25	22
No Related ALLL		0	3
Total		25	25
Commercial | Commercial construction loans
Financing Receivable, Modifications
With an ALLL		1	6
No Related ALLL		3	0
Total		4	6
Commercial | Commercial leases
Financing Receivable, Modifications
With an ALLL		0	3
No Related ALLL		2	1
Total		2	4
Loans and leases held for sale		1	1
Residential Mortgage
Financing Receivable, Modifications
With an ALLL		61	14
No Related ALLL		44	19
Total		105	33
Consumer
Financing Receivable, Modifications
With an ALLL		89	98
No Related ALLL		26	30
Total		115	128
Consumer | Home equity
Financing Receivable, Modifications
With an ALLL		50	53
No Related ALLL		22	24
Total		72	77
Total portfolio loans and leases		3,906	4,084
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		72	77
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
With an ALLL		14	21
No Related ALLL		4	6
Total		18	27
Total portfolio loans and leases		17,017	16,783
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		18	27
Consumer | Credit card
Financing Receivable, Modifications
With an ALLL		23	23
No Related ALLL		0	0
Total		23	23
Total portfolio loans and leases		1,763	1,766
Consumer | Credit card | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		23	23
Consumer | Other consumer loans
Financing Receivable, Modifications
With an ALLL		2	1
No Related ALLL		0	0
Total		2	1
Total portfolio loans and leases		3,521	2,752
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		2	1
Nonaccrual Portfolio Loans and Leases
Financing Receivable, Modifications
With an ALLL		350	304
No Related ALLL		189	194
Total		539	498
OREO and Other Repossessed Assets
Financing Receivable, Modifications
With an ALLL		0	0
No Related ALLL		20	29
Total		$ 20	$ 29

[1] Includes $1,406 and $1,023 of residential mortgage loans held for sale measured at fair value at June 30, 2022 and December 31, 2021, respectively.

[2] Includes $133 and $154 of residential mortgage loans measured at fair value at June 30, 2022 and December 31, 2021, respectively.

[3] Includes $21 and $24 of other short-term investments, $267 and $322 of portfolio loans and leases, $(3) and $(2) of ALLL, $2 and $2 of other assets, $10 and $1 of other liabilities, and $200 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2022 and December 31, 2021, respectively. For further information, refer to Note 12.