Credit Quality and the Allowance for Loan and Lease Losses - Summary of the Credit Risk Profile of the Bancorp's Residential Mortgage and Consumer Portfolio Segments by Class (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Modifications
Total portfolio loans and leases	[1],[2]	$ 120,088		$ 120,088		$ 121,480
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		113	$ 125	113	$ 125	123
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		1	$ 0	2	$ 2
Residential Mortgage | 30-89 days past due
Financing Receivable, Modifications
Residential mortgage loans						1
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		84		84		81
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		143		143		147
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Residential mortgage loans		2		2		2
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		889		889		3,199
Year Two		3,179		3,179		5,447
Year Three		5,114		5,114		2,989
Year Four		2,774		2,774		1,056
Year Five		973		973		354
Prior		4,251		4,251		4,460
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,180		17,180		17,505
Residential Mortgage | Residential mortgage loans | Performing
Financing Receivable, Modifications
Year One		889		889		3,199
Year Two		3,174		3,174		5,444
Year Three		5,109		5,109		2,985
Year Four		2,769		2,769		1,052
Year Five		969		969		347
Prior		4,145		4,145		4,356
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,055		17,055		17,383
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		889		889		3,195
Year Two		3,171		3,171		5,440
Year Three		5,103		5,103		2,981
Year Four		2,768		2,768		1,051
Year Five		968		968		344
Prior		4,129		4,129		4,336
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,028		17,028		17,347
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		4
Year Two		1		1		4
Year Three		5		5		3
Year Four		1		1		1
Year Five		1		1		2
Prior		13		13		15
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		21		21		29
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		2		2		0
Year Three		1		1		1
Year Four		0		0		0
Year Five		0		0		1
Prior		3		3		5
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		6		6		7
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0		0
Year Two		5		5		3
Year Three		5		5		4
Year Four		5		5		4
Year Five		4		4		7
Prior		106		106		104
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		125		125		122
Consumer
Financing Receivable, Modifications
Total portfolio loans and leases		44,970		44,970		45,091
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total portfolio loans and leases		17,293		17,293		17,628
Consumer | Home equity
Financing Receivable, Modifications
Year One		58		58		46
Year Two		43		43		3
Year Three		3		3		7
Year Four		6		6		15
Year Five		12		12		17
Prior		105		105		105
Revolving Loans		3,635		3,635		3,827
Revolving Loans Converted to Term Loans		36		36		19
Total portfolio loans and leases		3,898		3,898		4,039
Consumer | Home equity | Performing
Financing Receivable, Modifications
Year One		58		58		46
Year Two		43		43		3
Year Three		3		3		7
Year Four		6		6		15
Year Five		12		12		17
Prior		99		99		97
Revolving Loans		3,584		3,584		3,769
Revolving Loans Converted to Term Loans		35		35		18
Total portfolio loans and leases		3,840		3,840		3,972
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		58		58		46
Year Two		43		43		3
Year Three		3		3		7
Year Four		6		6		15
Year Five		12		12		17
Prior		97		97		94
Revolving Loans		3,561		3,561		3,741
Revolving Loans Converted to Term Loans		32		32		18
Total portfolio loans and leases		3,812		3,812		3,941
Consumer | Home equity | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		2		2		2
Revolving Loans		23		23		28
Revolving Loans Converted to Term Loans		3		3		0
Total portfolio loans and leases		28		28		30
Consumer | Home equity | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		1
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		0		0		1
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		6		6		8
Revolving Loans		51		51		58
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		58		58		67
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		3,410		3,410		6,072
Year Two		4,738		4,738		5,923
Year Three		4,409		4,409		2,635
Year Four		1,786		1,786		1,245
Year Five		742		742		431
Prior		349		349		246
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,434		15,434		16,552
Consumer | Indirect secured consumer loans | Performing
Financing Receivable, Modifications
Year One		3,408		3,408		6,068
Year Two		4,729		4,729		5,917
Year Three		4,401		4,401		2,628
Year Four		1,780		1,780		1,239
Year Five		739		739		427
Prior		346		346		244
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,403		15,403		16,523
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		3,392		3,392		6,034
Year Two		4,685		4,685		5,875
Year Three		4,363		4,363		2,600
Year Four		1,761		1,761		1,217
Year Five		727		727		416
Prior		337		337		239
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,265		15,265		16,381
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		16		16		34
Year Two		44		44		42
Year Three		38		38		28
Year Four		19		19		22
Year Five		12		12		11
Prior		9		9		5
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		138		138		142
Consumer | Indirect secured consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		0		0		0
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		2		2		4
Year Two		9		9		6
Year Three		8		8		7
Year Four		6		6		6
Year Five		3		3		4
Prior		3		3		2
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		31		31		29
Consumer | Credit card
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		1,817		1,817		1,874
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,817		1,817		1,874
Consumer | Credit card | Performing
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		1,785		1,785		1,847
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,785		1,785		1,847
Consumer | Credit card | Performing | Current
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		1,744		1,744		1,808
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,744		1,744		1,808
Consumer | Credit card | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		21		21		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		21		21		21
Consumer | Credit card | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		20		20		18
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		20		20		18
Consumer | Credit card | Nonperforming
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		32		32		27
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		32		32		27
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		2,080		2,080		2,720
Year Two		2,819		2,819		547
Year Three		348		348		358
Year Four		176		176		171
Year Five		95		95		114
Prior		119		119		149
Revolving Loans		850		850		913
Revolving Loans Converted to Term Loans		41		41		26
Total portfolio loans and leases		6,528		6,528		4,998
Consumer | Other consumer loans | Performing
Financing Receivable, Modifications
Year One		2,076		2,076		2,718
Year Two		2,789		2,789		546
Year Three		344		344		358
Year Four		175		175		171
Year Five		94		94		114
Prior		118		118		148
Revolving Loans		850		850		912
Revolving Loans Converted to Term Loans		41		41		26
Total portfolio loans and leases		6,487		6,487		4,993
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		2,071		2,071		2,704
Year Two		2,773		2,773		540
Year Three		340		340		355
Year Four		173		173		169
Year Five		92		92		112
Prior		117		117		146
Revolving Loans		847		847		908
Revolving Loans Converted to Term Loans		40		40		26
Total portfolio loans and leases		6,453		6,453		4,960
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		5		5		14
Year Two		16		16		6
Year Three		4		4		3
Year Four		2		2		2
Year Five		2		2		2
Prior		1		1		2
Revolving Loans		3		3		3
Revolving Loans Converted to Term Loans		1		1		0
Total portfolio loans and leases		34		34		32
Consumer | Other consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		0
Year Three		0		0		0
Year Four		0		0		0
Year Five		0		0		0
Prior		0		0		0
Revolving Loans		0		0		1
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		0		0		1
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		4		4		2
Year Two		30		30		1
Year Three		4		4		0
Year Four		1		1		0
Year Five		1		1		0
Prior		1		1		1
Revolving Loans		0		0		1
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		41		41		5
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		6,437		6,437		12,037
Year Two		10,779		10,779		11,920
Year Three		9,874		9,874		5,989
Year Four		4,742		4,742		2,487
Year Five		1,822		1,822		916
Prior		4,824		4,824		4,960
Revolving Loans		6,302		6,302		6,614
Revolving Loans Converted to Term Loans		77		77		45
Total portfolio loans and leases		44,857		44,857		44,968
Residential Mortgage and Consumer | Performing
Financing Receivable, Modifications
Year One		6,431		6,431		12,031
Year Two		10,735		10,735		11,910
Year Three		9,857		9,857		5,978
Year Four		4,730		4,730		2,477
Year Five		1,814		1,814		905
Prior		4,708		4,708		4,845
Revolving Loans		6,219		6,219		6,528
Revolving Loans Converted to Term Loans		76		76		44
Total portfolio loans and leases		44,570		44,570		44,718
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		6,410		6,410		11,979
Year Two		10,672		10,672		11,858
Year Three		9,809		9,809		5,943
Year Four		4,708		4,708		2,452
Year Five		1,799		1,799		889
Prior		4,680		4,680		4,815
Revolving Loans		6,152		6,152		6,457
Revolving Loans Converted to Term Loans		72		72		44
Total portfolio loans and leases		44,302		44,302		44,437
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		21		21		52
Year Two		61		61		52
Year Three		47		47		34
Year Four		22		22		25
Year Five		15		15		15
Prior		25		25		24
Revolving Loans		47		47		52
Revolving Loans Converted to Term Loans		4		4		0
Total portfolio loans and leases		242		242		254
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		2		2		0
Year Three		1		1		1
Year Four		0		0		0
Year Five		0		0		1
Prior		3		3		6
Revolving Loans		20		20		19
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		26		26		27
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		6		6		6
Year Two		44		44		10
Year Three		17		17		11
Year Four		12		12		10
Year Five		8		8		11
Prior		116		116		115
Revolving Loans		83		83		86
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		$ 287		$ 287		$ 250

[1] Includes $113 and $123 of residential mortgage loans measured at fair value at September 30, 2023 and December 31, 2022, respectively.

[2] Includes $59 and $17 of other short-term investments, $1,728 and $185 of portfolio loans and leases, $(27) and $(2) of ALLL, $11 and $2 of other assets, $15 and $9 of other liabilities, and $1,553 and $118 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2023 and December 31, 2022, respectively. For further information, refer to Note 12.