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, 2021	Dec. 31, 2020
Financing Receivable, Modifications
Total	[1],[2]	$ 112,050	$ 108,782
Residential Mortgage
Financing Receivable, Modifications
Loans measured at FV		154	161
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		2	3
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		49	103
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		139	242
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		5,887	4,008
Year Two		3,312	2,135
Year Three		1,300	834
Year Four		422	1,647
Year Five		966	2,312
Prior		4,356	4,831
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,243	15,767
Residential Mortgage | Residential mortgage loans | Performing
Financing Receivable, Modifications
Year One		5,887	4,007
Year Two		3,312	2,135
Year Three		1,299	832
Year Four		422	1,645
Year Five		964	2,309
Prior		4,326	4,779
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,210	15,707
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		5,886	4,006
Year Two		3,309	2,128
Year Three		1,294	827
Year Four		418	1,635
Year Five		954	2,301
Prior		4,261	4,719
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,122	15,616
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		1	1
Year Two		1	1
Year Three		1	3
Year Four		1	3
Year Five		1	1
Prior		13	12
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		18	21
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0	0
Year Two		2	6
Year Three		4	2
Year Four		3	7
Year Five		9	7
Prior		52	48
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		70	70
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0	1
Year Two		0	0
Year Three		1	2
Year Four		0	2
Year Five		2	3
Prior		30	52
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		33	60
Consumer
Financing Receivable, Modifications
Total		41,782	39,785
Consumer | Home equity
Financing Receivable, Modifications
Year One		2	11
Year Two		6	24
Year Three		13	30
Year Four		18	4
Year Five		2	2
Prior		126	168
Revolving Loans		3,904	4,933
Revolving Loans Converted to Term Loans		13	11
Total		4,084	5,183
Consumer | Home equity | Performing
Financing Receivable, Modifications
Year One		2	11
Year Two		6	24
Year Three		13	30
Year Four		18	4
Year Five		2	2
Prior		117	158
Revolving Loans		3,837	4,858
Revolving Loans Converted to Term Loans		12	10
Total		4,007	5,097
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		2	11
Year Two		6	24
Year Three		13	30
Year Four		18	4
Year Five		2	2
Prior		113	153
Revolving Loans		3,815	4,825
Revolving Loans Converted to Term Loans		12	10
Total		3,981	5,059
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		3	3
Revolving Loans		22	33
Revolving Loans Converted to Term Loans		0	0
Total		25	36
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		1	2
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		1	2
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		9	10
Revolving Loans		67	75
Revolving Loans Converted to Term Loans		1	1
Total		77	86
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		8,760	6,653
Year Two		4,244	3,800
Year Three		2,253	1,716
Year Four		926	882
Year Five		401	382
Prior		199	220
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,783	13,653
Consumer | Indirect secured consumer loans | Performing
Financing Receivable, Modifications
Year One		8,760	6,652
Year Two		4,232	3,795
Year Three		2,248	1,712
Year Four		921	879
Year Five		398	380
Prior		197	219
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,756	13,637
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		8,732	6,626
Year Two		4,206	3,752
Year Three		2,221	1,678
Year Four		902	860
Year Five		389	372
Prior		194	214
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		16,644	13,502
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		26	25
Year Two		24	41
Year Three		25	31
Year Four		17	17
Year Five		8	7
Prior		3	4
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		103	125
Consumer | Indirect secured consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		2	1
Year Two		2	2
Year Three		2	3
Year Four		2	2
Year Five		1	1
Prior		0	1
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		9	10
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		0	1
Year Two		12	5
Year Three		5	4
Year Four		5	3
Year Five		3	2
Prior		2	1
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		27	16
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		1,766	2,007
Revolving Loans Converted to Term Loans		0	0
Total		1,766	2,007
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		1,743	1,975
Revolving Loans Converted to Term Loans		0	0
Total		1,743	1,975
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		1,710	1,914
Revolving Loans Converted to Term Loans		0	0
Total		1,710	1,914
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		18	30
Revolving Loans Converted to Term Loans		0	0
Total		18	30
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		15	31
Revolving Loans Converted to Term Loans		0	0
Total		15	31
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		23	32
Revolving Loans Converted to Term Loans		0	0
Total		23	32
Consumer | Other consumer loans:
Financing Receivable, Modifications
Year One		695	885
Year Two		532	553
Year Three		279	441
Year Four		176	180
Year Five		106	32
Prior		47	41
Revolving Loans		916	881
Revolving Loans Converted to Term Loans		1	1
Total		2,752	3,014
Consumer | Other consumer loans: | Performing
Financing Receivable, Modifications
Year One		695	885
Year Two		532	553
Year Three		279	441
Year Four		176	180
Year Five		106	32
Prior		47	40
Revolving Loans		915	880
Revolving Loans Converted to Term Loans		1	1
Total		2,751	3,012
Consumer | Other consumer loans: | Performing | Current
Financing Receivable, Modifications
Year One		692	883
Year Two		530	546
Year Three		275	437
Year Four		174	178
Year Five		105	32
Prior		47	40
Revolving Loans		913	878
Revolving Loans Converted to Term Loans		0	1
Total		2,736	2,995
Consumer | Other consumer loans: | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		3	2
Year Two		2	5
Year Three		3	4
Year Four		2	2
Year Five		1	0
Prior		0	0
Revolving Loans		2	2
Revolving Loans Converted to Term Loans		1	0
Total		14	15
Consumer | Other consumer loans: | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0	0
Year Two		0	2
Year Three		1	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		1	2
Consumer | Other consumer loans: | 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	1
Revolving Loans		1	1
Revolving Loans Converted to Term Loans		0	0
Total		1	2
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		15,344	11,557
Year Two		8,094	6,512
Year Three		3,845	3,021
Year Four		1,542	2,713
Year Five		1,475	2,728
Prior		4,728	5,260
Revolving Loans		6,586	7,821
Revolving Loans Converted to Term Loans		14	12
Total		41,628	39,624
Residential Mortgage and Consumer | Performing
Financing Receivable, Modifications
Year One		15,344	11,555
Year Two		8,082	6,507
Year Three		3,839	3,015
Year Four		1,537	2,708
Year Five		1,470	2,723
Prior		4,687	5,196
Revolving Loans		6,495	7,713
Revolving Loans Converted to Term Loans		13	11
Total		41,467	39,428
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		15,312	11,526
Year Two		8,051	6,450
Year Three		3,803	2,972
Year Four		1,512	2,677
Year Five		1,450	2,707
Prior		4,615	5,126
Revolving Loans		6,438	7,617
Revolving Loans Converted to Term Loans		12	11
Total		41,193	39,086
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		30	28
Year Two		27	47
Year Three		29	38
Year Four		20	22
Year Five		10	8
Prior		19	19
Revolving Loans		42	65
Revolving Loans Converted to Term Loans		1	0
Total		178	227
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		2	1
Year Two		4	10
Year Three		7	5
Year Four		5	9
Year Five		10	8
Prior		53	51
Revolving Loans		15	31
Revolving Loans Converted to Term Loans		0	0
Total		96	115
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		0	2
Year Two		12	5
Year Three		6	6
Year Four		5	5
Year Five		5	5
Prior		41	64
Revolving Loans		91	108
Revolving Loans Converted to Term Loans		1	1
Total		$ 161	$ 196

[1] Includes $154 and $161 of residential mortgage loans measured at fair value at December 31, 2021 and 2020, respectively.

[2] Includes $24 and $55 of other short-term investments, $322 and $756 of portfolio loans and leases, $(2) and $(7) of ALLL, $2 and $5 of other assets, $1 and $2 of other liabilities and $263 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2021 and 2020, respectively. For further information, refer to Note 12.