Credit Quality and the Allowance for Loan and Lease Losses - Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Modifications
Total portfolio loans and leases	$ 116,485	$ 117,234
Commercial
Financing Receivable, Modifications
Year One	1,655	5,105
Year Two	4,493	6,197
Year Three	5,632	3,499
Year Four	3,187	1,650
Year Five	1,503	1,099
Prior	2,510	1,730
Revolving Loans	52,936	53,466
Total portfolio loans and leases	71,916	72,746
Commercial | Pass
Financing Receivable, Modifications
Year One	1,572	4,649
Year Two	4,158	5,759
Year Three	5,178	3,328
Year Four	3,029	1,579
Year Five	1,431	990
Prior	2,206	1,494
Revolving Loans	48,752	49,710
Total portfolio loans and leases	66,326	67,509
Commercial | Special mention
Financing Receivable, Modifications
Year One	44	158
Year Two	120	298
Year Three	285	90
Year Four	73	38
Year Five	27	20
Prior	126	121
Revolving Loans	1,943	2,056
Total portfolio loans and leases	2,618	2,781
Commercial | Substandard
Financing Receivable, Modifications
Year One	39	298
Year Two	215	140
Year Three	169	81
Year Four	85	33
Year Five	45	89
Prior	178	115
Revolving Loans	2,179	1,694
Total portfolio loans and leases	2,910	2,450
Commercial | Doubtful
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	62	6
Total portfolio loans and leases	62	6
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
Year One	764	2,245
Year Two	2,031	3,637
Year Three	3,205	1,902
Year Four	1,762	631
Year Five	576	308
Prior	740	499
Revolving Loans	43,131	44,048
Total portfolio loans and leases	52,209	53,270
Commercial | Commercial and industrial loans | Pass
Financing Receivable, Modifications
Year One	750	2,124
Year Two	1,910	3,434
Year Three	2,999	1,814
Year Four	1,660	580
Year Five	526	263
Prior	554	321
Revolving Loans	39,802	40,889
Total portfolio loans and leases	48,201	49,425
Commercial | Commercial and industrial loans | Special mention
Financing Receivable, Modifications
Year One	1	16
Year Two	72	100
Year Three	75	60
Year Four	43	33
Year Five	19	6
Prior	87	105
Revolving Loans	1,451	1,756
Total portfolio loans and leases	1,748	2,076
Commercial | Commercial and industrial loans | Substandard
Financing Receivable, Modifications
Year One	13	105
Year Two	49	103
Year Three	131	28
Year Four	59	18
Year Five	31	39
Prior	99	73
Revolving Loans	1,816	1,397
Total portfolio loans and leases	2,198	1,763
Commercial | Commercial and industrial loans | Doubtful
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	62	6
Total portfolio loans and leases	62	6
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
Year One	224	931
Year Two	957	1,123
Year Three	1,024	775
Year Four	700	418
Year Five	377	270
Prior	496	270
Revolving Loans	1,579	1,413
Total portfolio loans and leases	5,357	5,200
Commercial | Commercial mortgage owner-occupied loans | Pass
Financing Receivable, Modifications
Year One	179	870
Year Two	897	1,078
Year Three	983	746
Year Four	653	408
Year Five	367	219
Prior	432	260
Revolving Loans	1,456	1,279
Total portfolio loans and leases	4,967	4,860
Commercial | Commercial mortgage owner-occupied loans | Special mention
Financing Receivable, Modifications
Year One	28	30
Year Two	44	23
Year Three	17	18
Year Four	22	0
Year Five	1	6
Prior	18	0
Revolving Loans	25	20
Total portfolio loans and leases	155	97
Commercial | Commercial mortgage owner-occupied loans | Substandard
Financing Receivable, Modifications
Year One	17	31
Year Two	16	22
Year Three	24	11
Year Four	25	10
Year Five	9	45
Prior	46	10
Revolving Loans	98	114
Total portfolio loans and leases	235	243
Commercial | Commercial mortgage owner-occupied loans | Doubtful
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
Total portfolio loans and leases	0	0
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
Year One	214	1,078
Year Two	944	992
Year Three	935	269
Year Four	240	350
Year Five	320	293
Prior	511	247
Revolving Loans	2,825	2,847
Total portfolio loans and leases	5,989	6,076
Commercial | Commercial mortgage nonowner-occupied loans | Pass
Financing Receivable, Modifications
Year One	190	886
Year Two	867	825
Year Three	741	261
Year Four	240	348
Year Five	316	293
Prior	508	243
Revolving Loans	2,683	2,724
Total portfolio loans and leases	5,545	5,580
Commercial | Commercial mortgage nonowner-occupied loans | Special mention
Financing Receivable, Modifications
Year One	15	111
Year Two	3	166
Year Three	193	0
Year Four	0	2
Year Five	4	0
Prior	1	2
Revolving Loans	39	81
Total portfolio loans and leases	255	362
Commercial | Commercial mortgage nonowner-occupied loans | Substandard
Financing Receivable, Modifications
Year One	9	81
Year Two	74	1
Year Three	1	8
Year Four	0	0
Year Five	0	0
Prior	2	2
Revolving Loans	103	42
Total portfolio loans and leases	189	134
Commercial | Commercial mortgage nonowner-occupied loans | Doubtful
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
Total portfolio loans and leases	0	0
Commercial | Commercial construction loans
Financing Receivable, Modifications
Year One	0	232
Year Two	135	36
Year Three	87	78
Year Four	49	41
Year Five	41	70
Prior	76	6
Revolving Loans	5,401	5,158
Total portfolio loans and leases	5,789	5,621
Commercial | Commercial construction loans | Pass
Financing Receivable, Modifications
Year One	0	171
Year Two	77	36
Year Three	87	45
Year Four	49	41
Year Five	41	70
Prior	76	6
Revolving Loans	4,811	4,818
Total portfolio loans and leases	5,141	5,187
Commercial | Commercial construction loans | Special mention
Financing Receivable, Modifications
Year One	0	0
Year Two	1	0
Year Three	0	0
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	428	199
Total portfolio loans and leases	429	199
Commercial | Commercial construction loans | Substandard
Financing Receivable, Modifications
Year One	0	61
Year Two	57	0
Year Three	0	33
Year Four	0	0
Year Five	0	0
Prior	0	0
Revolving Loans	162	141
Total portfolio loans and leases	219	235
Commercial | Commercial construction loans | Doubtful
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
Total portfolio loans and leases	0	0
Commercial | Commercial leases
Financing Receivable, Modifications
Year One	453	619
Year Two	426	409
Year Three	381	475
Year Four	436	210
Year Five	189	158
Prior	687	708
Revolving Loans	0	0
Total portfolio loans and leases	2,572	2,579
Commercial | Commercial leases | Pass
Financing Receivable, Modifications
Year One	453	598
Year Two	407	386
Year Three	368	462
Year Four	427	202
Year Five	181	145
Prior	636	664
Revolving Loans	0	0
Total portfolio loans and leases	2,472	2,457
Commercial | Commercial leases | Special mention
Financing Receivable, Modifications
Year One	0	1
Year Two	0	9
Year Three	0	12
Year Four	8	3
Year Five	3	8
Prior	20	14
Revolving Loans	0	0
Total portfolio loans and leases	31	47
Commercial | Commercial leases | Substandard
Financing Receivable, Modifications
Year One	0	20
Year Two	19	14
Year Three	13	1
Year Four	1	5
Year Five	5	5
Prior	31	30
Revolving Loans	0	0
Total portfolio loans and leases	69	75
Commercial | Commercial leases | Doubtful
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
Total portfolio loans and leases	$ 0	$ 0