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		Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Modifications
Total	[1],[2]	$ 107,733	$ 108,782
Commercial
Financing Receivable, Modifications
Year One		4,819	10,665
Year Two		7,043	4,149
Year Three		3,595	2,839
Year Four		2,099	1,767
Year Five		1,345	1,369
Prior		3,105	2,523
Revolving Loans		45,014	45,685
Revolving Loans Converted to Term Loans		0	0
Total		67,020	68,997
Commercial | Pass
Financing Receivable, Modifications
Year One		4,646	9,711
Year Two		6,430	3,901
Year Three		3,353	2,420
Year Four		1,785	1,604
Year Five		1,216	1,266
Prior		2,900	2,300
Revolving Loans		39,953	39,029
Revolving Loans Converted to Term Loans		0	0
Total		60,283	60,231
Commercial | Special mention
Financing Receivable, Modifications
Year One		53	448
Year Two		256	142
Year Three		139	205
Year Four		94	61
Year Five		38	43
Prior		47	47
Revolving Loans		2,075	3,388
Revolving Loans Converted to Term Loans		0	0
Total		2,702	4,334
Commercial | Substandard
Financing Receivable, Modifications
Year One		120	494
Year Two		357	104
Year Three		103	205
Year Four		220	102
Year Five		91	60
Prior		158	176
Revolving Loans		2,986	3,261
Revolving Loans Converted to Term Loans		0	0
Total		4,035	4,402
Commercial | Doubtful
Financing Receivable, Modifications
Year One		0	12
Year Two		0	2
Year Three		0	9
Year Four		0	0
Year Five		0	0
Prior		0	0
Revolving Loans		0	7
Revolving Loans Converted to Term Loans		0	0
Total		0	30
Commercial | Commercial and industrial loans
Financing Receivable, Modifications
Year One		3,207	7,227
Year Two		4,308	2,272
Year Three		1,827	1,397
Year Four		888	806
Year Five		566	515
Prior		1,058	828
Revolving Loans		35,710	36,620
Revolving Loans Converted to Term Loans		0	0
Total		47,564	49,665
Commercial | Commercial and industrial loans | Pass
Financing Receivable, Modifications
Year One		3,164	7,042
Year Two		4,183	2,144
Year Three		1,733	1,114
Year Four		743	700
Year Five		466	471
Prior		928	703
Revolving Loans		32,500	31,657
Revolving Loans Converted to Term Loans		0	0
Total		43,717	43,831
Commercial | Commercial and industrial loans | Special mention
Financing Receivable, Modifications
Year One		17	66
Year Two		33	46
Year Three		35	167
Year Four		26	46
Year Five		30	5
Prior		21	21
Revolving Loans		1,210	2,317
Revolving Loans Converted to Term Loans		0	0
Total		1,372	2,668
Commercial | Commercial and industrial loans | Substandard
Financing Receivable, Modifications
Year One		26	119
Year Two		92	80
Year Three		59	107
Year Four		119	60
Year Five		70	39
Prior		109	104
Revolving Loans		2,000	2,639
Revolving Loans Converted to Term Loans		0	0
Total		2,475	3,148
Commercial | Commercial and industrial loans | Doubtful
Financing Receivable, Modifications
Year One		0	0
Year Two		0	2
Year Three		0	9
Year Four		0	0
Year Five		0	0
Prior		0	0
Revolving Loans		0	7
Revolving Loans Converted to Term Loans		0	0
Total		0	18
Commercial | Commercial mortgage owner-occupied loans
Financing Receivable, Modifications
Year One		559	1,316
Year Two		1,024	684
Year Three		647	465
Year Four		385	302
Year Five		248	264
Prior		562	467
Revolving Loans		1,332	1,177
Revolving Loans Converted to Term Loans		0	0
Total		4,757	4,675
Commercial | Commercial mortgage owner-occupied loans | Pass
Financing Receivable, Modifications
Year One		517	1,047
Year Two		927	655
Year Three		596	416
Year Four		358	288
Year Five		246	249
Prior		513	420
Revolving Loans		1,140	1,025
Revolving Loans Converted to Term Loans		0	0
Total		4,297	4,100
Commercial | Commercial mortgage owner-occupied loans | Special mention
Financing Receivable, Modifications
Year One		4	58
Year Two		30	12
Year Three		40	16
Year Four		2	7
Year Five		0	2
Prior		22	17
Revolving Loans		85	64
Revolving Loans Converted to Term Loans		0	0
Total		183	176
Commercial | Commercial mortgage owner-occupied loans | Substandard
Financing Receivable, Modifications
Year One		38	211
Year Two		67	17
Year Three		11	33
Year Four		25	7
Year Five		2	13
Prior		27	30
Revolving Loans		107	88
Revolving Loans Converted to Term Loans		0	0
Total		277	399
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
Revolving Loans Converted to Term Loans		0	0
Total		0	0
Commercial | Commercial mortgage nonowner-occupied loans
Financing Receivable, Modifications
Year One		267	1,315
Year Two		1,051	750
Year Three		710	614
Year Four		506	269
Year Five		218	261
Prior		470	375
Revolving Loans		2,368	2,343
Revolving Loans Converted to Term Loans		0	0
Total		5,590	5,927
Commercial | Commercial mortgage nonowner-occupied loans | Pass
Financing Receivable, Modifications
Year One		205	902
Year Two		736	679
Year Three		627	548
Year Four		381	247
Year Five		207	223
Prior		459	341
Revolving Loans		1,598	1,626
Revolving Loans Converted to Term Loans		0	0
Total		4,213	4,566
Commercial | Commercial mortgage nonowner-occupied loans | Special mention
Financing Receivable, Modifications
Year One		31	252
Year Two		120	68
Year Three		57	17
Year Four		61	8
Year Five		8	36
Prior		0	9
Revolving Loans		338	416
Revolving Loans Converted to Term Loans		0	0
Total		615	806
Commercial | Commercial mortgage nonowner-occupied loans | Substandard
Financing Receivable, Modifications
Year One		31	149
Year Two		195	3
Year Three		26	49
Year Four		64	14
Year Five		3	2
Prior		11	25
Revolving Loans		432	301
Revolving Loans Converted to Term Loans		0	0
Total		762	543
Commercial | Commercial mortgage nonowner-occupied loans | Doubtful
Financing Receivable, Modifications
Year One		0	12
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	12
Commercial | Commercial construction loans
Financing Receivable, Modifications
Year One		43	173
Year Two		139	49
Year Three		47	27
Year Four		27	0
Year Five		0	9
Prior		11	12
Revolving Loans		5,604	5,545
Revolving Loans Converted to Term Loans		0	0
Total		5,871	5,815
Commercial | Commercial construction loans | Pass
Financing Receivable, Modifications
Year One		28	98
Year Two		73	49
Year Three		47	27
Year Four		27	0
Year Five		0	9
Prior		11	12
Revolving Loans		4,715	4,721
Revolving Loans Converted to Term Loans		0	0
Total		4,901	4,916
Commercial | Commercial construction loans | Special mention
Financing Receivable, Modifications
Year One		0	67
Year Two		66	0
Year Three		0	0
Year Four		0	0
Year Five		0	0
Prior		0	0
Revolving Loans		442	591
Revolving Loans Converted to Term Loans		0	0
Total		508	658
Commercial | Commercial construction loans | Substandard
Financing Receivable, Modifications
Year One		15	8
Year Two		0	0
Year Three		0	0
Year Four		0	0
Year Five		0	0
Prior		0	0
Revolving Loans		447	233
Revolving Loans Converted to Term Loans		0	0
Total		462	241
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
Revolving Loans Converted to Term Loans		0	0
Total		0	0
Commercial | Commercial leases
Financing Receivable, Modifications
Year One		743	634
Year Two		521	394
Year Three		364	336
Year Four		293	390
Year Five		313	320
Prior		1,004	841
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		3,238	2,915
Commercial | Commercial leases | Pass
Financing Receivable, Modifications
Year One		732	622
Year Two		511	374
Year Three		350	315
Year Four		276	369
Year Five		297	314
Prior		989	824
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		3,155	2,818
Commercial | Commercial leases | Special mention
Financing Receivable, Modifications
Year One		1	5
Year Two		7	16
Year Three		7	5
Year Four		5	0
Year Five		0	0
Prior		4	0
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		24	26
Commercial | Commercial leases | Substandard
Financing Receivable, Modifications
Year One		10	7
Year Two		3	4
Year Three		7	16
Year Four		12	21
Year Five		16	6
Prior		11	17
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		59	71
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
Revolving Loans Converted to Term Loans		0	0
Total		$ 0	$ 0

[1] Includes $151 and $161 of residential mortgage loans measured at fair value at June 30, 2021 and December 31, 2020, respectively.

[2] Includes $33 and $55 of other short-term investments, $455 and $756 of portfolio loans and leases, $(3) and $(7) of ALLL, $3 and $5 of other assets, $1 and $2 of other liabilities, and $400 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2021 and December 31, 2020, respectively. For further information, refer to Note 11.