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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Modifications
Total portfolio loans and leases	[1]	$ 116,668		$ 116,668		$ 117,234
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		114	$ 113	114	$ 113	116
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		0	$ 1	1	$ 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		85		85		79
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		141		141		141
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Residential mortgage loans		1		1		2
Residential Mortgage | 30-89 days past due
Financing Receivable, Modifications
Residential mortgage loans		1		1
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		1,282		1,282		995
Year Two		1,016		1,016		3,149
Year Three		3,009		3,009		5,014
Year Four		4,697		4,697		2,714
Year Five		2,544		2,544		949
Prior		4,504		4,504		4,089
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,052		17,052		16,910
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		1,281		1,281		995
Year Two		1,014		1,014		3,139
Year Three		2,995		2,995		5,001
Year Four		4,678		4,678		2,703
Year Five		2,533		2,533		943
Prior		4,386		4,386		3,971
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		16,887		16,887		16,752
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		0
Year Two		0		0		3
Year Three		5		5		6
Year Four		7		7		5
Year Five		2		2		1
Prior		12		12		14
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		27		27		29
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		1
Year Three		1		1		1
Year Four		3		3		1
Year Five		1		1		1
Prior		3		3		3
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		8		8		7
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0		0
Year Two		2		2		6
Year Three		8		8		6
Year Four		9		9		5
Year Five		8		8		4
Prior		103		103		101
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		130		130		122
Consumer
Financing Receivable, Modifications
Total portfolio loans and leases		45,538		45,538		44,488
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total portfolio loans and leases		17,166		17,166		17,026
Consumer | Home equity
Financing Receivable, Modifications
Year One		115		115		84
Year Two		71		71		41
Year Three		36		36		2
Year Four		2		2		6
Year Five		5		5		11
Prior		99		99		100
Revolving Loans		3,676		3,676		3,624
Revolving Loans Converted to Term Loans		70		70		48
Total portfolio loans and leases		4,074		4,074		3,916
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		115		115		84
Year Two		71		71		41
Year Three		36		36		2
Year Four		2		2		6
Year Five		5		5		11
Prior		90		90		92
Revolving Loans		3,602		3,602		3,549
Revolving Loans Converted to Term Loans		63		63		46
Total portfolio loans and leases		3,984		3,984		3,831
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		20		20		25
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		23		23		28
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		0
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		0		0		0
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		7		7		6
Revolving Loans		54		54		50
Revolving Loans Converted to Term Loans		6		6		1
Total portfolio loans and leases		67		67		57
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		5,241		5,241		4,152
Year Two		3,149		3,149		4,393
Year Three		3,404		3,404		3,974
Year Four		2,760		2,760		1,552
Year Five		935		935		612
Prior		453		453		282
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,942		15,942		14,965
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		5,228		5,228		4,126
Year Two		3,117		3,117		4,333
Year Three		3,347		3,347		3,925
Year Four		2,721		2,721		1,527
Year Five		917		917		597
Prior		440		440		271
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,770		15,770		14,779
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		11		11		22
Year Two		23		23		49
Year Three		40		40		40
Year Four		27		27		19
Year Five		13		13		12
Prior		8		8		8
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		122		122		150
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		11
Year Three		17		17		9
Year Four		12		12		6
Year Five		5		5		3
Prior		5		5		3
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		50		50		36
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		1,703		1,703		1,865
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,703		1,703		1,865
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		1,634		1,634		1,789
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,634		1,634		1,789
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		20		20		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		20		20		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		18		18		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		18		18		21
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		31		31		34
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		31		31		34
Consumer | Solar energy installation loans
Financing Receivable, Modifications
Year One		694		694		2,456
Year Two		2,196		2,196		1,228
Year Three		1,152		1,152		2
Year Four		2		2		0
Year Five		0		0		0
Prior		34		34		42
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		4,078		4,078		3,728
Consumer | Solar energy installation loans | Performing | Current
Financing Receivable, Modifications
Year One		692		692		2,415
Year Two		2,154		2,154		1,192
Year Three		1,115		1,115		2
Year Four		2		2		0
Year Five		0		0		0
Prior		34		34		41
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		3,997		3,997		3,650
Consumer | Solar energy installation loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		12
Year Two		8		8		6
Year Three		8		8		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		17		17		18
Consumer | Solar energy installation 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 | Solar energy installation loans | Nonperforming
Financing Receivable, Modifications
Year One		1		1		29
Year Two		34		34		30
Year Three		29		29		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		64		64		60
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		165		165		518
Year Two		395		395		724
Year Three		565		565		333
Year Four		247		247		249
Year Five		188		188		104
Prior		164		164		156
Revolving Loans		813		813		861
Revolving Loans Converted to Term Loans		38		38		43
Total portfolio loans and leases		2,575		2,575		2,988
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		164		164		511
Year Two		388		388		703
Year Three		552		552		328
Year Four		243		243		246
Year Five		187		187		101
Prior		160		160		154
Revolving Loans		809		809		859
Revolving Loans Converted to Term Loans		38		38		41
Total portfolio loans and leases		2,541		2,541		2,943
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		5
Year Two		5		5		15
Year Three		9		9		4
Year Four		3		3		2
Year Five		1		1		2
Prior		3		3		2
Revolving Loans		3		3		2
Revolving Loans Converted to Term Loans		0		0		1
Total portfolio loans and leases		25		25		33
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		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		0		0		0
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0		2
Year Two		2		2		6
Year Three		4		4		1
Year Four		1		1		1
Year Five		0		0		1
Prior		1		1		0
Revolving Loans		1		1		0
Revolving Loans Converted to Term Loans		0		0		1
Total portfolio loans and leases		9		9		12
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		7,497		7,497		8,205
Year Two		6,827		6,827		9,535
Year Three		8,166		8,166		9,325
Year Four		7,708		7,708		4,521
Year Five		3,672		3,672		1,676
Prior		5,254		5,254		4,669
Revolving Loans		6,192		6,192		6,350
Revolving Loans Converted to Term Loans		108		108		91
Total portfolio loans and leases		45,424		45,424		44,372
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		7,480		7,480		8,131
Year Two		6,744		6,744		9,408
Year Three		8,045		8,045		9,258
Year Four		7,646		7,646		4,482
Year Five		3,642		3,642		1,652
Prior		5,110		5,110		4,529
Revolving Loans		6,045		6,045		6,197
Revolving Loans Converted to Term Loans		101		101		87
Total portfolio loans and leases		44,813		44,813		43,744
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		14		14		39
Year Two		36		36		73
Year Three		62		62		50
Year Four		37		37		26
Year Five		16		16		15
Prior		25		25		26
Revolving Loans		43		43		48
Revolving Loans Converted to Term Loans		1		1		2
Total portfolio loans and leases		234		234		279
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		0		0		1
Year Three		1		1		1
Year Four		3		3		1
Year Five		1		1		1
Prior		3		3		3
Revolving Loans		18		18		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		26		26		28
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		3		3		35
Year Two		47		47		53
Year Three		58		58		16
Year Four		22		22		12
Year Five		13		13		8
Prior		116		116		111
Revolving Loans		86		86		84
Revolving Loans Converted to Term Loans		6		6		2
Total portfolio loans and leases		$ 351		$ 351		$ 321

[1] Includes $50 and $55 of other short-term investments, $1,131 and $1,573 of portfolio loans and leases, $(21) and $(28) of ALLL, $8 and $10 of other assets, $13 and $14 of other liabilities and $1,008 and $1,409 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2024 and December 31, 2023, respectively. For further information, refer to Note 12.