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		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Modifications
Total portfolio loans and leases	[1]	$ 116,579		$ 116,579		$ 117,234
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		109	$ 124	109	$ 124	116
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		0	$ 1	1	$ 1
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		77		77		79
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		126		126		141
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Residential mortgage loans		2		2		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		788		788		995
Year Two		1,027		1,027		3,149
Year Three		3,060		3,060		5,014
Year Four		4,791		4,791		2,714
Year Five		2,594		2,594		949
Prior		4,671		4,671		4,089
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		16,931		16,931		16,910
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		788		788		995
Year Two		1,025		1,025		3,139
Year Three		3,048		3,048		5,001
Year Four		4,775		4,775		2,703
Year Five		2,585		2,585		943
Prior		4,550		4,550		3,971
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		16,771		16,771		16,752
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		1		1		3
Year Three		4		4		6
Year Four		5		5		5
Year Five		2		2		1
Prior		13		13		14
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		25		25		29
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0		0
Year Two		1		1		1
Year Three		1		1		1
Year Four		2		2		1
Year Five		0		0		1
Prior		4		4		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		0		0		6
Year Three		7		7		6
Year Four		9		9		5
Year Five		7		7		4
Prior		104		104		101
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		127		127		122
Consumer
Financing Receivable, Modifications
Total portfolio loans and leases		44,796		44,796		44,488
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total portfolio loans and leases		17,040		17,040		17,026
Consumer | Home equity
Financing Receivable, Modifications
Year One		63		63		84
Year Two		76		76		41
Year Three		38		38		2
Year Four		2		2		6
Year Five		5		5		11
Prior		104		104		100
Revolving Loans		3,618		3,618		3,624
Revolving Loans Converted to Term Loans		63		63		48
Total portfolio loans and leases		3,969		3,969		3,916
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		63		63		84
Year Two		76		76		41
Year Three		38		38		2
Year Four		2		2		6
Year Five		5		5		11
Prior		96		96		92
Revolving Loans		3,545		3,545		3,549
Revolving Loans Converted to Term Loans		57		57		46
Total portfolio loans and leases		3,882		3,882		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		1		1		2
Revolving Loans		21		21		25
Revolving Loans Converted to Term Loans		4		4		1
Total portfolio loans and leases		26		26		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		52		52		50
Revolving Loans Converted to Term Loans		2		2		1
Total portfolio loans and leases		61		61		57
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		3,439		3,439		4,152
Year Two		3,444		3,444		4,393
Year Three		3,721		3,721		3,974
Year Four		3,143		3,143		1,552
Year Five		1,122		1,122		612
Prior		573		573		282
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,442		15,442		14,965
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		3,431		3,431		4,126
Year Two		3,415		3,415		4,333
Year Three		3,668		3,668		3,925
Year Four		3,104		3,104		1,527
Year Five		1,104		1,104		597
Prior		556		556		271
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		15,278		15,278		14,779
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		7		7		22
Year Two		24		24		49
Year Three		40		40		40
Year Four		31		31		19
Year Five		14		14		12
Prior		12		12		8
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		128		128		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		1		1		4
Year Two		5		5		11
Year Three		13		13		9
Year Four		8		8		6
Year Five		4		4		3
Prior		5		5		3
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		36		36		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		1,733		1,733		1,865
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,733		1,733		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		1,666		1,666		1,789
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		1,666		1,666		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		19		19		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		19		19		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		17		17		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		17		17		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		470		470		2,456
Year Two		2,267		2,267		1,228
Year Three		1,176		1,176		2
Year Four		2		2		0
Year Five		0		0		0
Prior		36		36		42
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		3,951		3,951		3,728
Consumer | Solar energy installation loans | Performing | Current
Financing Receivable, Modifications
Year One		469		469		2,415
Year Two		2,226		2,226		1,192
Year Three		1,140		1,140		2
Year Four		2		2		0
Year Five		0		0		0
Prior		35		35		41
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		3,872		3,872		3,650
Consumer | Solar energy installation loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		1		12
Year Two		6		6		6
Year Three		6		6		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		13		13		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		0		0		29
Year Two		35		35		30
Year Three		30		30		0
Year Four		0		0		0
Year Five		0		0		0
Prior		1		1		1
Revolving Loans		0		0		0
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		66		66		60
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		115		115		518
Year Two		441		441		724
Year Three		617		617		333
Year Four		275		275		249
Year Five		208		208		104
Prior		184		184		156
Revolving Loans		774		774		861
Revolving Loans Converted to Term Loans		47		47		43
Total portfolio loans and leases		2,661		2,661		2,988
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		115		115		511
Year Two		435		435		703
Year Three		604		604		328
Year Four		271		271		246
Year Five		206		206		101
Prior		181		181		154
Revolving Loans		772		772		859
Revolving Loans Converted to Term Loans		45		45		41
Total portfolio loans and leases		2,629		2,629		2,943
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0		5
Year Two		4		4		15
Year Three		9		9		4
Year Four		3		3		2
Year Five		2		2		2
Prior		2		2		2
Revolving Loans		2		2		2
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		23		23		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		0		0		0
Revolving Loans Converted to Term Loans		1		1		1
Total portfolio loans and leases		9		9		12
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		4,875		4,875		8,205
Year Two		7,255		7,255		9,535
Year Three		8,612		8,612		9,325
Year Four		8,213		8,213		4,521
Year Five		3,929		3,929		1,676
Prior		5,568		5,568		4,669
Revolving Loans		6,125		6,125		6,350
Revolving Loans Converted to Term Loans		110		110		91
Total portfolio loans and leases		44,687		44,687		44,372
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		4,866		4,866		8,131
Year Two		7,177		7,177		9,408
Year Three		8,498		8,498		9,258
Year Four		8,154		8,154		4,482
Year Five		3,900		3,900		1,652
Prior		5,418		5,418		4,529
Revolving Loans		5,983		5,983		6,197
Revolving Loans Converted to Term Loans		102		102		87
Total portfolio loans and leases		44,098		44,098		43,744
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		8		8		39
Year Two		35		35		73
Year Three		59		59		50
Year Four		39		39		26
Year Five		18		18		15
Prior		28		28		26
Revolving Loans		42		42		48
Revolving Loans Converted to Term Loans		5		5		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		1		1		1
Year Three		1		1		1
Year Four		2		2		1
Year Five		0		0		1
Prior		4		4		3
Revolving Loans		17		17		21
Revolving Loans Converted to Term Loans		0		0		0
Total portfolio loans and leases		25		25		28
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		1		1		35
Year Two		42		42		53
Year Three		54		54		16
Year Four		18		18		12
Year Five		11		11		8
Prior		118		118		111
Revolving Loans		83		83		84
Revolving Loans Converted to Term Loans		3		3		2
Total portfolio loans and leases		$ 330		$ 330		$ 321

[1] Includes $52 and $55 of other short-term investments, $1,272 and $1,573 of portfolio loans and leases, $(23) and $(28) of ALLL, $7 and $10 of other assets, $13 and $14 of other liabilities and $1,136 and $1,409 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2024 and December 31, 2023, respectively. For further information, refer to Note 11.