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
		Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing Receivable, Modifications
Total portfolio loans and leases	[1]	$ 122,191		$ 119,791
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		109	$ 113	108
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		0	$ 0
Residential Mortgage | 30-89 days past due
Financing Receivable, Modifications
Residential mortgage loans		1		1
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		73		90
Residential Mortgage | 90 days or more past due
Financing Receivable, Modifications
Residential mortgage loans				1
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total portfolio loans and leases		167		162
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Residential mortgage loans		2		2
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		346		1,963
Year Two		2,127		1,003
Year Three		980		2,975
Year Four		2,900		4,629
Year Five		4,495		2,503
Prior		6,624		4,362
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		17,472		17,435
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		346		1,961
Year Two		2,124		998
Year Three		973		2,961
Year Four		2,885		4,606
Year Five		4,472		2,491
Prior		6,495		4,245
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		17,295		17,262
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		1
Year Two		3		3
Year Three		2		4
Year Four		3		9
Year Five		5		4
Prior		13		12
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		26		33
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		1
Year Two		0		0
Year Three		1		1
Year Four		0		1
Year Five		3		0
Prior		4		2
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		8		5
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		0		2
Year Three		4		9
Year Four		12		13
Year Five		15		8
Prior		112		103
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		143		135
Consumer
Financing Receivable, Modifications
Total portfolio loans and leases		47,054		46,498
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total portfolio loans and leases		17,581		17,543
Consumer | Home equity
Financing Receivable, Modifications
Year One		40		168
Year Two		160		67
Year Three		63		35
Year Four		32		2
Year Five		2		4
Prior		95		94
Revolving and Other Loans		3,796		3,739
Revolving Loans Converted to Term Loans		77		79
Total portfolio loans and leases		4,265		4,188
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		40		168
Year Two		160		67
Year Three		63		34
Year Four		32		2
Year Five		2		4
Prior		87		86
Revolving and Other Loans		3,714		3,660
Revolving Loans Converted to Term Loans		71		72
Total portfolio loans and leases		4,169		4,093
Consumer | Home equity | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		1		1
Revolving and Other Loans		23		23
Revolving Loans Converted to Term Loans		3		1
Total portfolio loans and leases		27		25
Consumer | Home equity | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		0		0
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		1
Year Four		0		0
Year Five		0		0
Prior		7		7
Revolving and Other Loans		59		56
Revolving Loans Converted to Term Loans		3		6
Total portfolio loans and leases		69		70
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		2,332		6,796
Year Two		6,064		2,873
Year Three		2,609		3,104
Year Four		2,819		2,411
Year Five		2,076		769
Prior		904		360
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		16,804		16,313
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		2,331		6,773
Year Two		6,036		2,836
Year Three		2,572		3,046
Year Four		2,767		2,371
Year Five		2,042		753
Prior		882		349
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		16,630		16,128
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		19
Year Two		21		27
Year Three		25		39
Year Four		33		27
Year Five		21		11
Prior		13		7
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		114		130
Consumer | Indirect secured consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		0		0
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		0		4
Year Two		7		10
Year Three		12		19
Year Four		19		13
Year Five		13		5
Prior		9		4
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		60		55
Consumer | Credit card
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		1,660		1,734
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		1,660		1,734
Consumer | Credit card | Performing | Current
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		1,595		1,664
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		1,595		1,664
Consumer | Credit card | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		17		18
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		17		18
Consumer | Credit card | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		17		20
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		17		20
Consumer | Credit card | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		31		32
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		31		32
Consumer | Solar energy installation loans
Financing Receivable, Modifications
Year One		192		897
Year Two		853		2,140
Year Three		2,077		1,129
Year Four		1,105		2
Year Five		2		0
Prior		33		34
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		4,262		4,202
Consumer | Solar energy installation loans | Performing | Current
Financing Receivable, Modifications
Year One		192		894
Year Two		849		2,095
Year Three		2,047		1,094
Year Four		1,088		2
Year Five		2		0
Prior		32		33
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		4,210		4,118
Consumer | Solar energy installation loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		2
Year Two		3		11
Year Three		13		7
Year Four		6		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		22		20
Consumer | Solar energy installation loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		0		0
Consumer | Solar energy installation loans | Nonperforming
Financing Receivable, Modifications
Year One		0		1
Year Two		1		34
Year Three		17		28
Year Four		11		0
Year Five		0		0
Prior		1		1
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		30		64
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		56		202
Year Two		171		358
Year Three		325		521
Year Four		481		223
Year Five		200		172
Prior		287		145
Revolving and Other Loans		930		861
Revolving Loans Converted to Term Loans		32		36
Total portfolio loans and leases		2,482		2,518
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		56		201
Year Two		170		351
Year Three		319		507
Year Four		471		219
Year Five		197		171
Prior		283		142
Revolving and Other Loans		926		860
Revolving Loans Converted to Term Loans		31		34
Total portfolio loans and leases		2,453		2,485
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		1
Year Two		1		5
Year Three		4		10
Year Four		7		3
Year Five		3		1
Prior		3		2
Revolving and Other Loans		3		1
Revolving Loans Converted to Term Loans		0		1
Total portfolio loans and leases		21		24
Consumer | Other consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		0
Year Three		0		0
Year Four		0		0
Year Five		0		0
Prior		0		0
Revolving and Other Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		0		0
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		0		2
Year Three		2		4
Year Four		3		1
Year Five		0		0
Prior		1		1
Revolving and Other Loans		1		0
Revolving Loans Converted to Term Loans		1		1
Total portfolio loans and leases		8		9
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		2,966		10,026
Year Two		9,375		6,441
Year Three		6,054		7,764
Year Four		7,337		7,267
Year Five		6,775		3,448
Prior		7,943		4,995
Revolving and Other Loans		6,386		6,334
Revolving Loans Converted to Term Loans		109		115
Total portfolio loans and leases		46,945		46,390
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		2,965		9,997
Year Two		9,339		6,347
Year Three		5,974		7,642
Year Four		7,243		7,200
Year Five		6,715		3,419
Prior		7,779		4,855
Revolving and Other Loans		6,235		6,184
Revolving Loans Converted to Term Loans		102		106
Total portfolio loans and leases		46,352		45,750
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1		23
Year Two		28		46
Year Three		44		60
Year Four		49		39
Year Five		29		16
Prior		30		22
Revolving and Other Loans		43		42
Revolving Loans Converted to Term Loans		3		2
Total portfolio loans and leases		227		250
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		1
Year Two		0		0
Year Three		1		1
Year Four		0		1
Year Five		3		0
Prior		4		2
Revolving and Other Loans		17		20
Revolving Loans Converted to Term Loans		0		0
Total portfolio loans and leases		25		25
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		0		5
Year Two		8		48
Year Three		35		61
Year Four		45		27
Year Five		28		13
Prior		130		116
Revolving and Other Loans		91		88
Revolving Loans Converted to Term Loans		4		7
Total portfolio loans and leases		$ 341		$ 365

[1] Includes $47 and $51 of other short-term investments, $874 and $1,000 of portfolio loans and leases, $(16) and $(19) of ALLL, $6 and $5 of other assets, $12 and $12 of other liabilities and $774 and $889 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2025 and December 31, 2024, respectively. For further information, refer to Note 7.