Credit Quality and the Allowance for Loan and Lease Losses - Summary of the Bancorp's Nonaccrual Loans and Leases by Class (Details) - USD ($)		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Modifications
With an ALLL		$ 333,000,000	$ 304,000,000
No Related ALLL		206,000,000	223,000,000
Total		539,000,000	527,000,000
Loans and leases held for sale	[1]	1,007,000,000	4,415,000,000
Total portfolio loans and leases	[2],[3]	121,480,000,000	112,050,000,000
Nonperforming
Financing Receivable, Modifications
Loans and leases held for sale		0	15,000,000
Nonperforming | Government Insured
Financing Receivable, Modifications
Total portfolio loans and leases		15,000,000	26,000,000
Restructured nonaccrual loans and leases		11,000,000	11,000,000
Commercial
Financing Receivable, Modifications
With an ALLL		149,000,000	192,000,000
No Related ALLL		114,000,000	145,000,000
Total		263,000,000	337,000,000
Total portfolio loans and leases		76,389,000,000	70,268,000,000
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
With an ALLL		114,000,000	151,000,000
No Related ALLL		101,000,000	128,000,000
Total		215,000,000	279,000,000
Loans and leases held for sale		73,000,000	7,000,000
Total portfolio loans and leases		57,232,000,000	51,659,000,000
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
With an ALLL		9,000,000	10,000,000
No Related ALLL		7,000,000	13,000,000
Total		16,000,000	23,000,000
Total portfolio loans and leases		5,258,000,000	4,709,000,000
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
With an ALLL		20,000,000	22,000,000
No Related ALLL		4,000,000	3,000,000
Total		24,000,000	25,000,000
Total portfolio loans and leases		5,762,000,000	5,607,000,000
Commercial | Commercial construction loans
Financing Receivable, Modifications
With an ALLL		6,000,000	6,000,000
No Related ALLL		2,000,000	0
Total		8,000,000	6,000,000
Total portfolio loans and leases		5,433,000,000	5,241,000,000
Commercial | Commercial leases
Financing Receivable, Modifications
With an ALLL		0	3,000,000
No Related ALLL		0	1,000,000
Total		0	4,000,000
Loans and leases held for sale		0	1,000,000
Total portfolio loans and leases		2,704,000,000	3,052,000,000
Residential Mortgage
Financing Receivable, Modifications
With an ALLL		81,000,000	14,000,000
No Related ALLL		43,000,000	19,000,000
Total		124,000,000	33,000,000
Consumer
Financing Receivable, Modifications
With an ALLL		103,000,000	98,000,000
No Related ALLL		25,000,000	30,000,000
Total		128,000,000	128,000,000
Total portfolio loans and leases		45,091,000,000	41,782,000,000
Consumer | Home equity
Financing Receivable, Modifications
With an ALLL		45,000,000	53,000,000
No Related ALLL		22,000,000	24,000,000
Total		67,000,000	77,000,000
Total portfolio loans and leases		4,039,000,000	4,084,000,000
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		67,000,000	77,000,000
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
With an ALLL		26,000,000	21,000,000
No Related ALLL		3,000,000	6,000,000
Total		29,000,000	27,000,000
Total portfolio loans and leases		16,552,000,000	16,783,000,000
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		29,000,000	27,000,000
Consumer | Credit card
Financing Receivable, Modifications
With an ALLL		27,000,000	23,000,000
No Related ALLL		0	0
Total		27,000,000	23,000,000
Total portfolio loans and leases		1,874,000,000	1,766,000,000
Consumer | Credit card | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		27,000,000	23,000,000
Consumer | Other consumer loans:
Financing Receivable, Modifications
With an ALLL		5,000,000	1,000,000
No Related ALLL		0	0
Total		5,000,000	1,000,000
Total portfolio loans and leases		4,998,000,000	2,752,000,000
Consumer | Other consumer loans: | Nonperforming
Financing Receivable, Modifications
Total portfolio loans and leases		5,000,000	1,000,000
Nonaccrual Portfolio Loans and Leases
Financing Receivable, Modifications
With an ALLL		333,000,000	304,000,000
No Related ALLL		182,000,000	194,000,000
Total		515,000,000	498,000,000
OREO and Other Repossessed Assets
Financing Receivable, Modifications
With an ALLL		0	0
No Related ALLL		24,000,000	29,000,000
Total		$ 24,000,000	$ 29,000,000

[1] Includes $600 and $1,023 of residential mortgage loans held for sale measured at fair value at December 31, 2022 and 2021, respectively.

[2] Includes $123 and $154 of residential mortgage loans measured at fair value at December 31, 2022 and 2021, respectively.

[3] Includes $17 and $24 of other short-term investments, $185 and $322 of portfolio loans and leases, $(2) and $(2) of ALLL, $2 and $2 of other assets, $9 and $1 of other liabilities and $118 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2022 and 2021, respectively. For further information, refer to Note 12.