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		Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Modifications
With an ALLL		$ 347	$ 304
No Related ALLL		219	223
Total		566	527
Loans and leases held for sale	[1]	2,616	4,415
Total portfolio loans and leases	[2],[3]	115,865	112,050
Nonperforming
Financing Receivable, Modifications
Loans and leases held for sale		4	15
Nonperforming | Government Insured
Financing Receivable, Modifications
Total portfolio loans and leases		20	26
Restructured nonaccrual loans and leases		11	11
Commercial
Financing Receivable, Modifications
With an ALLL		206	192
No Related ALLL		117	145
Total		323	337
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
With an ALLL		167	151
No Related ALLL		105	128
Total		272	279
Loans and leases held for sale		22	7
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
With an ALLL		8	10
No Related ALLL		12	13
Total		20	23
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
With an ALLL		22	22
No Related ALLL		0	3
Total		22	25
Commercial | Commercial construction loans
Financing Receivable, Modifications
With an ALLL		6	6
No Related ALLL		0	0
Total		6	6
Commercial | Commercial leases
Financing Receivable, Modifications
With an ALLL		3	3
No Related ALLL		0	1
Total		3	4
Loans and leases held for sale		1	1
Residential Mortgage
Financing Receivable, Modifications
With an ALLL		45	14
No Related ALLL		43	19
Total		88	33
Consumer
Financing Receivable, Modifications
With an ALLL		96	98
No Related ALLL		27	30
Total		123	128
Consumer | Home equity
Financing Receivable, Modifications
With an ALLL		55	53
No Related ALLL		22	24
Total		77	77
Total portfolio loans and leases		3,916	4,084
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		77	77
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
With an ALLL		17	21
No Related ALLL		5	6
Total		22	27
Total portfolio loans and leases		17,424	16,783
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		22	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		1,690	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		1	1
No Related ALLL		0	0
Total		1	1
Total portfolio loans and leases		2,753	2,752
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		1	1
Nonaccrual Portfolio Loans and Leases
Financing Receivable, Modifications
With an ALLL		347	304
No Related ALLL		187	194
Total		534	498
OREO and Other Repossessed Assets
Financing Receivable, Modifications
With an ALLL		0	0
No Related ALLL		32	29
Total		$ 32	$ 29

[1] Includes $858 and $1,023 of residential mortgage loans held for sale measured at fair value at March 31, 2022 and December 31, 2021, respectively.

[2] Includes $145 and $154 of residential mortgage loans measured at fair value at March 31, 2022 and December 31, 2021, respectively.

[3] Includes $24 and $24 of other short-term investments, $266 and $322 of portfolio loans and leases, $(2) and $(2) of ALLL, $2 and $2 of other assets, an immaterial amount and $1 of other liabilities, and $209 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2022 and December 31, 2021, respectively. For further information, refer to Note 11.