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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Modifications
Total portfolio loans and leases	[1]	$ 123,130		$ 123,130		$ 119,791
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		107	$ 114	107	$ 114	108
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		0	$ 0	0	$ 1
Residential Mortgage | 30-89 days past due
Financing Receivable, Modifications
Residential mortgage loans		2		2		1
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		70		70		90
Residential Mortgage | 90 days or more past due
Financing Receivable, Modifications
Residential mortgage loans		1		1		1
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		159		159		162
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Residential mortgage loans		3		3		2
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		1,336		1,336		1,963
Year Two		2,089		2,089		1,003
Year Three		936		936		2,975
Year Four		2,749		2,749		4,629
Year Five		4,256		4,256		2,503
Prior		6,171		6,171		4,362
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,537		17,537		17,435
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		1,336		1,336		1,961
Year Two		2,084		2,084		998
Year Three		928		928		2,961
Year Four		2,731		2,731		4,606
Year Five		4,230		4,230		2,491
Prior		6,049		6,049		4,245
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,358		17,358		17,262
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		1
Year Two		3		3		3
Year Three		1		1		4
Year Four		3		3		9
Year Five		8		8		4
Prior		15		15		12
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		30		30		33
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		1
Year Two		1		1		0
Year Three		2		2		1
Year Four		1		1		1
Year Five		3		3		0
Prior		3		3		2
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		10		10		5
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0		0
Year Two		1		1		2
Year Three		5		5		9
Year Four		14		14		13
Year Five		15		15		8
Prior		104		104		103
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		139		139		135
Consumer
Financing Receivable, Modifications
Total portfolio loans and leases		48,707		48,707		46,498
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total portfolio loans and leases		17,644		17,644		17,543
Consumer | Home equity
Financing Receivable, Modifications
Year One		148		148		168
Year Two		146		146		67
Year Three		55		55		35
Year Four		28		28		2
Year Five		2		2		4
Prior		86		86		94
Revolving and Other Loans		4,127		4,127		3,739
Revolving Loans Converted to Term Loans		86		86		79
Total portfolio loans and leases		4,678		4,678		4,188
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		148		148		168
Year Two		146		146		67
Year Three		54		54		34
Year Four		28		28		2
Year Five		2		2		4
Prior		79		79		86
Revolving and Other Loans		4,047		4,047		3,660
Revolving Loans Converted to Term Loans		81		81		72
Total portfolio loans and leases		4,585		4,585		4,093
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		1		1		1
Revolving and Other Loans		19		19		23
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		21		21		25
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 and Other 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		1		1		1
Year Four		0		0		0
Year Five		0		0		0
Prior		6		6		7
Revolving and Other Loans		61		61		56
Revolving Loans Converted to Term Loans		4		4		6
Total portfolio loans and leases		72		72		70
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		6,513		6,513		6,796
Year Two		4,918		4,918		2,873
Year Three		2,123		2,123		3,104
Year Four		2,280		2,280		2,411
Year Five		1,488		1,488		769
Prior		563		563		360
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,885		17,885		16,313
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		6,493		6,493		6,773
Year Two		4,885		4,885		2,836
Year Three		2,087		2,087		3,046
Year Four		2,232		2,232		2,371
Year Five		1,458		1,458		753
Prior		548		548		349
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17,703		17,703		16,128
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		17		17		19
Year Two		24		24		27
Year Three		23		23		39
Year Four		30		30		27
Year Five		18		18		11
Prior		9		9		7
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		121		121		130
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 and Other 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		3		3		4
Year Two		9		9		10
Year Three		13		13		19
Year Four		18		18		13
Year Five		12		12		5
Prior		6		6		4
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		61		61		55
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 and Other Loans		1,692		1,692		1,734
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,692		1,692		1,734
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 and Other Loans		1,630		1,630		1,664
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,630		1,630		1,664
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 and Other Loans		17		17		18
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17		17		18
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 and Other Loans		16		16		20
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		16		16		20
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 and Other Loans		29		29		32
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		29		29		32
Consumer | Solar energy installation loans
Financing Receivable, Modifications
Year One		600		600		897
Year Two		759		759		2,140
Year Three		1,978		1,978		1,129
Year Four		1,062		1,062		2
Year Five		1		1		0
Prior		32		32		34
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		4,432		4,432		4,202
Consumer | Solar energy installation loans | Performing | Current
Financing Receivable, Modifications
Year One		599		599		894
Year Two		754		754		2,095
Year Three		1,956		1,956		1,094
Year Four		1,050		1,050		2
Year Five		1		1		0
Prior		31		31		33
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		4,391		4,391		4,118
Consumer | Solar energy installation loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		2
Year Two		3		3		11
Year Three		10		10		7
Year Four		5		5		0
Year Five		0		0		0
Prior		0		0		0
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		19		19		20
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 and Other 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		0		0		1
Year Two		2		2		34
Year Three		12		12		28
Year Four		7		7		0
Year Five		0		0		0
Prior		1		1		1
Revolving and Other Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		22		22		64
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		199		199		202
Year Two		123		123		358
Year Three		272		272		521
Year Four		413		413		223
Year Five		157		157		172
Prior		234		234		145
Revolving and Other Loans		952		952		861
Revolving Loans Converted to Term Loans		26		26		36
Total portfolio loans and leases		2,376		2,376		2,518
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		198		198		201
Year Two		122		122		351
Year Three		267		267		507
Year Four		405		405		219
Year Five		155		155		171
Prior		231		231		142
Revolving and Other Loans		949		949		860
Revolving Loans Converted to Term Loans		25		25		34
Total portfolio loans and leases		2,352		2,352		2,485
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		1
Year Two		1		1		5
Year Three		3		3		10
Year Four		5		5		3
Year Five		2		2		1
Prior		3		3		2
Revolving and Other Loans		2		2		1
Revolving Loans Converted to Term Loans		0		0		1
Total portfolio loans and leases		17		17		24
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 and Other 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		0
Year Two		0		0		2
Year Three		2		2		4
Year Four		3		3		1
Year Five		0		0		0
Prior		0		0		1
Revolving and Other Loans		1		1		0
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		7		7		9
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		8,796		8,796		10,026
Year Two		8,035		8,035		6,441
Year Three		5,364		5,364		7,764
Year Four		6,532		6,532		7,267
Year Five		5,904		5,904		3,448
Prior		7,086		7,086		4,995
Revolving and Other Loans		6,771		6,771		6,334
Revolving Loans Converted to Term Loans		112		112		115
Total portfolio loans and leases		48,600		48,600		46,390
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		8,774		8,774		9,997
Year Two		7,991		7,991		6,347
Year Three		5,292		5,292		7,642
Year Four		6,446		6,446		7,200
Year Five		5,846		5,846		3,419
Prior		6,938		6,938		4,855
Revolving and Other Loans		6,626		6,626		6,184
Revolving Loans Converted to Term Loans		106		106		106
Total portfolio loans and leases		48,019		48,019		45,750
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		19		19		23
Year Two		31		31		46
Year Three		37		37		60
Year Four		43		43		39
Year Five		28		28		16
Prior		28		28		22
Revolving and Other Loans		38		38		42
Revolving Loans Converted to Term Loans		1		1		2
Total portfolio loans and leases		225		225		250
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		1
Year Two		1		1		0
Year Three		2		2		1
Year Four		1		1		1
Year Five		3		3		0
Prior		3		3		2
Revolving and Other Loans		16		16		20
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		26		26		25
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		3		3		5
Year Two		12		12		48
Year Three		33		33		61
Year Four		42		42		27
Year Five		27		27		13
Prior		117		117		116
Revolving and Other Loans		91		91		88
Revolving Loans Converted to Term Loans		5		5		7
Total portfolio loans and leases		$ 330		$ 330		$ 365

[1] Includes $42 and $51 of other short-term investments, $649 and $1,000 of portfolio loans and leases, $(11) and $(19) of ALLL, $4 and $5 of other assets, $11 and $12 of other liabilities and $563 and $889 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2025 and December 31, 2024, respectively. For further information, refer to Note 7.