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		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Modifications
Total	[1],[2]	$ 117,234	$ 121,480
Residential Mortgage
Financing Receivable, Modifications
Loans measured at FV		116	123
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		2	2
Residential Mortgage | 30-89 days past due
Financing Receivable, Modifications
Loans measured at FV		1	1
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		79	81
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		141	147
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Loans measured at FV		2	2
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		995	3,199
Year Two		3,149	5,447
Year Three		5,014	2,989
Year Four		2,714	1,056
Year Five		949	354
Prior		4,089	4,460
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,910	17,505
Residential Mortgage | Residential mortgage loans | Performing
Financing Receivable, Modifications
Year One		995	3,199
Year Two		3,143	5,444
Year Three		5,008	2,985
Year Four		2,709	1,052
Year Five		945	347
Prior		3,988	4,356
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,788	17,383
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		995	3,195
Year Two		3,139	5,440
Year Three		5,001	2,981
Year Four		2,703	1,051
Year Five		943	344
Prior		3,971	4,336
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,752	17,347
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0	4
Year Two		3	4
Year Three		6	3
Year Four		5	1
Year Five		1	2
Prior		14	15
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		29	29
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0	0
Year Two		1	0
Year Three		1	1
Year Four		1	0
Year Five		1	1
Prior		3	5
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		7	7
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0	0
Year Two		6	3
Year Three		6	4
Year Four		5	4
Year Five		4	7
Prior		101	104
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		122	122
Consumer
Financing Receivable, Modifications
Total		44,488	45,091
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total		17,026	17,628
Consumer | Home equity
Financing Receivable, Modifications
Year One		84	46
Year Two		41	3
Year Three		2	7
Year Four		6	15
Year Five		11	17
Prior		100	105
Revolving Loans		3,624	3,827
Revolving Loans Converted to Term Loans		48	19
Total		3,916	4,039
Consumer | Home equity | Performing
Financing Receivable, Modifications
Year One		84	46
Year Two		41	3
Year Three		2	7
Year Four		6	15
Year Five		11	17
Prior		94	97
Revolving Loans		3,574	3,769
Revolving Loans Converted to Term Loans		47	18
Total		3,859	3,972
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		84	46
Year Two		41	3
Year Three		2	7
Year Four		6	15
Year Five		11	17
Prior		92	94
Revolving Loans		3,549	3,741
Revolving Loans Converted to Term Loans		46	18
Total		3,831	3,941
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		2	2
Revolving Loans		25	28
Revolving Loans Converted to Term Loans		1	0
Total		28	30
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	1
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		0	1
Consumer | Home equity | 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		6	8
Revolving Loans		50	58
Revolving Loans Converted to Term Loans		1	1
Total		57	67
Consumer | Automobile Loan [Member]
Financing Receivable, Modifications
Year One		4,152	6,072
Year Two		4,393	5,923
Year Three		3,974	2,635
Year Four		1,552	1,245
Year Five		612	431
Prior		282	246
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		14,965	16,552
Consumer | Automobile Loan [Member] | Performing
Financing Receivable, Modifications
Year One		4,148	6,068
Year Two		4,382	5,917
Year Three		3,965	2,628
Year Four		1,546	1,239
Year Five		609	427
Prior		279	244
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		14,929	16,523
Consumer | Automobile Loan [Member] | Performing | Current
Financing Receivable, Modifications
Year One		4,126	6,034
Year Two		4,333	5,875
Year Three		3,925	2,600
Year Four		1,527	1,217
Year Five		597	416
Prior		271	239
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		14,779	16,381
Consumer | Automobile Loan [Member] | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		22	34
Year Two		49	42
Year Three		40	28
Year Four		19	22
Year Five		12	11
Prior		8	5
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		150	142
Consumer | Automobile Loan [Member] | 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 Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		0	0
Consumer | Automobile Loan [Member] | Nonperforming
Financing Receivable, Modifications
Year One		4	4
Year Two		11	6
Year Three		9	7
Year Four		6	6
Year Five		3	4
Prior		3	2
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		36	29
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 Loans		1,865	1,874
Revolving Loans Converted to Term Loans		0	0
Total		1,865	1,874
Consumer | Credit card | Performing
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 Loans		1,831	1,847
Revolving Loans Converted to Term Loans		0	0
Total		1,831	1,847
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 Loans		1,789	1,808
Revolving Loans Converted to Term Loans		0	0
Total		1,789	1,808
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 Loans		21	21
Revolving Loans Converted to Term Loans		0	0
Total		21	21
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 Loans		21	18
Revolving Loans Converted to Term Loans		0	0
Total		21	18
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 Loans		34	27
Revolving Loans Converted to Term Loans		0	0
Total		34	27
Consumer | Other consumer loans:
Financing Receivable, Modifications
Year One		2,974	2,720
Year Two		1,952	547
Year Three		335	358
Year Four		249	171
Year Five		104	114
Prior		198	149
Revolving Loans		861	913
Revolving Loans Converted to Term Loans		43	26
Total		6,716	4,998
Consumer | Other consumer loans: | Performing
Financing Receivable, Modifications
Year One		2,943	2,718
Year Two		1,916	546
Year Three		334	358
Year Four		248	171
Year Five		103	114
Prior		197	148
Revolving Loans		861	912
Revolving Loans Converted to Term Loans		42	26
Total		6,644	4,993
Consumer | Other consumer loans: | Performing | Current
Financing Receivable, Modifications
Year One		2,926	2,704
Year Two		1,895	540
Year Three		330	355
Year Four		246	169
Year Five		101	112
Prior		195	146
Revolving Loans		859	908
Revolving Loans Converted to Term Loans		41	26
Total		6,593	4,960
Consumer | Other consumer loans: | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		17	14
Year Two		21	6
Year Three		4	3
Year Four		2	2
Year Five		2	2
Prior		2	2
Revolving Loans		2	3
Revolving Loans Converted to Term Loans		1	0
Total		51	32
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 Loans		0	1
Revolving Loans Converted to Term Loans		0	0
Total		0	1
Consumer | Other consumer loans: | Nonperforming
Financing Receivable, Modifications
Year One		31	2
Year Two		36	1
Year Three		1	0
Year Four		1	0
Year Five		1	0
Prior		1	1
Revolving Loans		0	1
Revolving Loans Converted to Term Loans		1	0
Total		72	5
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		8,205	12,037
Year Two		9,535	11,920
Year Three		9,325	5,989
Year Four		4,521	2,487
Year Five		1,676	916
Prior		4,669	4,960
Revolving Loans		6,350	6,614
Revolving Loans Converted to Term Loans		91	45
Total		44,372	44,968
Residential Mortgage and Consumer | Performing
Financing Receivable, Modifications
Year One		8,170	12,031
Year Two		9,482	11,910
Year Three		9,309	5,978
Year Four		4,509	2,477
Year Five		1,668	905
Prior		4,558	4,845
Revolving Loans		6,266	6,528
Revolving Loans Converted to Term Loans		89	44
Total		44,051	44,718
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		8,131	11,979
Year Two		9,408	11,858
Year Three		9,258	5,943
Year Four		4,482	2,452
Year Five		1,652	889
Prior		4,529	4,815
Revolving Loans		6,197	6,457
Revolving Loans Converted to Term Loans		87	44
Total		43,744	44,437
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		39	52
Year Two		73	52
Year Three		50	34
Year Four		26	25
Year Five		15	15
Prior		26	24
Revolving Loans		48	52
Revolving Loans Converted to Term Loans		2	0
Total		279	254
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0	0
Year Two		1	0
Year Three		1	1
Year Four		1	0
Year Five		1	1
Prior		3	6
Revolving Loans		21	19
Revolving Loans Converted to Term Loans		0	0
Total		28	27
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		35	6
Year Two		53	10
Year Three		16	11
Year Four		12	10
Year Five		8	11
Prior		111	115
Revolving Loans		84	86
Revolving Loans Converted to Term Loans		2	1
Total		$ 321	$ 250

[1] Includes $55 and $17 of other short-term investments, $1,573 and $185 of portfolio loans and leases, $(28) and $(2) of ALLL, $10 and $2 of other assets, $14 and $9 of other liabilities and $1,409 and $118 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2023 and 2022, respectively. For further information, refer to Note 12.

[2] Includes $116 and $123 of residential mortgage loans measured at fair value at December 31, 2023 and 2022, respectively.