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, 2024	Dec. 31, 2023
Financing Receivable, Modifications
Total	$ 119,791	$ 117,234
Residential Mortgage
Financing Receivable, Modifications
Loans measured at FV	108	116
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments	1	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	90	79
Residential Mortgage | 90 days or more past due
Financing Receivable, Modifications
Loans measured at FV	1
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total	162	141
Residential Mortgage | Nonperforming
Financing Receivable, Modifications
Loans measured at FV	2	2
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One	1,963	995
Year Two	1,003	3,149
Year Three	2,975	5,014
Year Four	4,629	2,714
Year Five	2,503	949
Prior	4,362	4,089
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	17,435	16,910
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One	1,961	995
Year Two	998	3,139
Year Three	2,961	5,001
Year Four	4,606	2,703
Year Five	2,491	943
Prior	4,245	3,971
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	17,262	16,752
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One	1	0
Year Two	3	3
Year Three	4	6
Year Four	9	5
Year Five	4	1
Prior	12	14
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	33	29
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One	1	0
Year Two	0	1
Year Three	1	1
Year Four	1	1
Year Five	0	1
Prior	2	3
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	5	7
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One	0	0
Year Two	2	6
Year Three	9	6
Year Four	13	5
Year Five	8	4
Prior	103	101
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	135	122
Consumer
Financing Receivable, Modifications
Total	46,498	44,488
Consumer | Residential mortgage loans
Financing Receivable, Modifications
Total	17,543	17,026
Consumer | Home equity
Financing Receivable, Modifications
Year One	168	84
Year Two	67	41
Year Three	35	2
Year Four	2	6
Year Five	4	11
Prior	94	100
Revolving and Other Loans	3,739	3,624
Revolving Loans Converted to Term Loans	79	48
Total	4,188	3,916
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One	168	84
Year Two	67	41
Year Three	34	2
Year Four	2	6
Year Five	4	11
Prior	86	92
Revolving and Other Loans	3,660	3,549
Revolving Loans Converted to Term Loans	72	46
Total	4,093	3,831
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	2
Revolving and Other Loans	23	25
Revolving Loans Converted to Term Loans	1	1
Total	25	28
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	0	0
Consumer | Home equity | Nonperforming
Financing Receivable, Modifications
Year One	0	0
Year Two	0	0
Year Three	1	0
Year Four	0	0
Year Five	0	0
Prior	7	6
Revolving and Other Loans	56	50
Revolving Loans Converted to Term Loans	6	1
Total	70	57
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One	6,796	4,152
Year Two	2,873	4,393
Year Three	3,104	3,974
Year Four	2,411	1,552
Year Five	769	612
Prior	360	282
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	16,313	14,965
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One	6,773	4,126
Year Two	2,836	4,333
Year Three	3,046	3,925
Year Four	2,371	1,527
Year Five	753	597
Prior	349	271
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	16,128	14,779
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One	19	22
Year Two	27	49
Year Three	39	40
Year Four	27	19
Year Five	11	12
Prior	7	8
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	130	150
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	0	0
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Year One	4	4
Year Two	10	11
Year Three	19	9
Year Four	13	6
Year Five	5	3
Prior	4	3
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	55	36
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	1,734	1,865
Revolving Loans Converted to Term Loans	0	0
Total	1,734	1,865
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	1,664	1,789
Revolving Loans Converted to Term Loans	0	0
Total	1,664	1,789
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	18	21
Revolving Loans Converted to Term Loans	0	0
Total	18	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 and Other Loans	20	21
Revolving Loans Converted to Term Loans	0	0
Total	20	21
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	32	34
Revolving Loans Converted to Term Loans	0	0
Total	32	34
Consumer | Solar energy installation loans
Financing Receivable, Modifications
Year One	897	2,456
Year Two	2,140	1,228
Year Three	1,129	2
Year Four	2	0
Year Five	0	0
Prior	34	42
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	4,202	3,728
Consumer | Solar energy installation loans | Performing | Current
Financing Receivable, Modifications
Year One	894	2,415
Year Two	2,095	1,192
Year Three	1,094	2
Year Four	2	0
Year Five	0	0
Prior	33	41
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	4,118	3,650
Consumer | Solar energy installation loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One	2	12
Year Two	11	6
Year Three	7	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	20	18
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	0	0
Consumer | Solar energy installation loans | Nonperforming
Financing Receivable, Modifications
Year One	1	29
Year Two	34	30
Year Three	28	0
Year Four	0	0
Year Five	0	0
Prior	1	1
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total	64	60
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One	202	518
Year Two	358	724
Year Three	521	333
Year Four	223	249
Year Five	172	104
Prior	145	156
Revolving and Other Loans	861	861
Revolving Loans Converted to Term Loans	36	43
Total	2,518	2,988
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One	201	511
Year Two	351	703
Year Three	507	328
Year Four	219	246
Year Five	171	101
Prior	142	154
Revolving and Other Loans	860	859
Revolving Loans Converted to Term Loans	34	41
Total	2,485	2,943
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One	1	5
Year Two	5	15
Year Three	10	4
Year Four	3	2
Year Five	1	2
Prior	2	2
Revolving and Other Loans	1	2
Revolving Loans Converted to Term Loans	1	1
Total	24	33
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	0	0
Consumer | Other consumer loans | Nonperforming
Financing Receivable, Modifications
Year One	0	2
Year Two	2	6
Year Three	4	1
Year Four	1	1
Year Five	0	1
Prior	1	0
Revolving and Other Loans	0	0
Revolving Loans Converted to Term Loans	1	1
Total	9	12
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One	10,026	8,205
Year Two	6,441	9,535
Year Three	7,764	9,325
Year Four	7,267	4,521
Year Five	3,448	1,676
Prior	4,995	4,669
Revolving and Other Loans	6,334	6,350
Revolving Loans Converted to Term Loans	115	91
Total	46,390	44,372
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One	9,997	8,131
Year Two	6,347	9,408
Year Three	7,642	9,258
Year Four	7,200	4,482
Year Five	3,419	1,652
Prior	4,855	4,529
Revolving and Other Loans	6,184	6,197
Revolving Loans Converted to Term Loans	106	87
Total	45,750	43,744
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One	23	39
Year Two	46	73
Year Three	60	50
Year Four	39	26
Year Five	16	15
Prior	22	26
Revolving and Other Loans	42	48
Revolving Loans Converted to Term Loans	2	2
Total	250	279
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One	1	0
Year Two	0	1
Year Three	1	1
Year Four	1	1
Year Five	0	1
Prior	2	3
Revolving and Other Loans	20	21
Revolving Loans Converted to Term Loans	0	0
Total	25	28
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One	5	35
Year Two	48	53
Year Three	61	16
Year Four	27	12
Year Five	13	8
Prior	116	111
Revolving and Other Loans	88	84
Revolving Loans Converted to Term Loans	7	2
Total	$ 365	$ 321