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		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financing Receivable, Modifications
Total	[1],[2]	$ 115,865		$ 112,050
Residential Mortgage
Financing Receivable, Modifications
Residential mortgage loans		145	$ 153	154
Residential Mortgage | Federal Housing Administration Loan
Financing Receivable, Modifications
Losses due to claim denials and curtailments		1	$ 1
Residential Mortgage | 30-89 days past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		64		49
Residential Mortgage | 90 days or more past due | Federal Housing Administration Loan
Financing Receivable, Modifications
Total		172		139
Residential Mortgage | Residential mortgage loans
Financing Receivable, Modifications
Year One		1,124		5,887
Year Two		5,774		3,312
Year Three		3,259		1,300
Year Four		1,206		422
Year Five		418		966
Prior		5,218		4,356
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		16,999		16,243
Residential Mortgage | Residential mortgage loans | Performing
Financing Receivable, Modifications
Year One		1,124		5,887
Year Two		5,773		3,312
Year Three		3,257		1,299
Year Four		1,204		422
Year Five		415		964
Prior		5,138		4,326
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		16,911		16,210
Residential Mortgage | Residential mortgage loans | Performing | Current
Financing Receivable, Modifications
Year One		1,124		5,886
Year Two		5,773		3,309
Year Three		3,255		1,294
Year Four		1,203		418
Year Five		413		954
Prior		5,116		4,261
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		16,884		16,122
Residential Mortgage | Residential mortgage loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		1
Year Two		0		1
Year Three		1		1
Year Four		1		1
Year Five		1		1
Prior		12		13
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		15		18
Residential Mortgage | Residential mortgage loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		0
Year Two		0		2
Year Three		1		4
Year Four		0		3
Year Five		1		9
Prior		10		52
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		12		70
Residential Mortgage | Residential mortgage loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		1		0
Year Three		2		1
Year Four		2		0
Year Five		3		2
Prior		80		30
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		88		33
Consumer | Home equity
Financing Receivable, Modifications
Year One		0		2
Year Two		2		6
Year Three		5		13
Year Four		12		18
Year Five		16		2
Prior		120		126
Revolving Loans		3,745		3,904
Revolving Loans Converted to Term Loans		16		13
Total		3,916		4,084
Consumer | Home equity | Performing
Financing Receivable, Modifications
Year One		0		2
Year Two		2		6
Year Three		5		13
Year Four		12		18
Year Five		16		2
Prior		110		117
Revolving Loans		3,679		3,837
Revolving Loans Converted to Term Loans		15		12
Total		3,839		4,007
Consumer | Home equity | Performing | Current
Financing Receivable, Modifications
Year One		0		2
Year Two		2		6
Year Three		5		13
Year Four		12		18
Year Five		16		2
Prior		106		113
Revolving Loans		3,657		3,815
Revolving Loans Converted to Term Loans		15		12
Total		3,813		3,981
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		22
Revolving Loans Converted to Term Loans		0		0
Total		25		25
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		1
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		1		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		10		9
Revolving Loans		66		67
Revolving Loans Converted to Term Loans		1		1
Total		77		77
Consumer | Indirect secured consumer loans
Financing Receivable, Modifications
Year One		2,595		8,760
Year Two		7,896		4,244
Year Three		3,751		2,253
Year Four		1,932		926
Year Five		760		401
Prior		490		199
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		17,424		16,783
Consumer | Indirect secured consumer loans | Performing
Financing Receivable, Modifications
Year One		2,595		8,760
Year Two		7,895		4,232
Year Three		3,742		2,248
Year Four		1,927		921
Year Five		756		398
Prior		487		197
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		17,402		16,756
Consumer | Indirect secured consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		2,591		8,732
Year Two		7,860		4,206
Year Three		3,715		2,221
Year Four		1,901		902
Year Five		741		389
Prior		477		194
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		17,285		16,644
Consumer | Indirect secured consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		4		26
Year Two		32		24
Year Three		25		25
Year Four		24		17
Year Five		14		8
Prior		9		3
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		108		103
Consumer | Indirect secured consumer loans | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		2
Year Two		3		2
Year Three		2		2
Year Four		2		2
Year Five		1		1
Prior		1		0
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		9		9
Consumer | Indirect secured consumer loans | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		1		12
Year Three		9		5
Year Four		5		5
Year Five		4		3
Prior		3		2
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		22		27
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		1,690		1,766
Revolving Loans Converted to Term Loans		0		0
Total		1,690		1,766
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		1,667		1,743
Revolving Loans Converted to Term Loans		0		0
Total		1,667		1,743
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		1,636		1,710
Revolving Loans Converted to Term Loans		0		0
Total		1,636		1,710
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		17		18
Revolving Loans Converted to Term Loans		0		0
Total		17		18
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		14		15
Revolving Loans Converted to Term Loans		0		0
Total		14		15
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		23
Revolving Loans Converted to Term Loans		0		0
Total		23		23
Consumer | Other consumer loans
Financing Receivable, Modifications
Year One		122		695
Year Two		645		532
Year Three		467		279
Year Four		241		176
Year Five		155		106
Prior		136		47
Revolving Loans		977		916
Revolving Loans Converted to Term Loans		10		1
Total		2,753		2,752
Consumer | Other consumer loans | Performing
Financing Receivable, Modifications
Year One		122		695
Year Two		645		532
Year Three		467		279
Year Four		241		176
Year Five		155		106
Prior		136		47
Revolving Loans		976		915
Revolving Loans Converted to Term Loans		10		1
Total		2,752		2,751
Consumer | Other consumer loans | Performing | Current
Financing Receivable, Modifications
Year One		122		692
Year Two		642		530
Year Three		465		275
Year Four		238		174
Year Five		153		105
Prior		135		47
Revolving Loans		974		913
Revolving Loans Converted to Term Loans		10		0
Total		2,739		2,736
Consumer | Other consumer loans | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		0		3
Year Two		3		2
Year Three		2		3
Year Four		2		2
Year Five		2		1
Prior		1		0
Revolving Loans		2		2
Revolving Loans Converted to Term Loans		0		1
Total		12		14
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		1
Year Four		1		0
Year Five		0		0
Prior		0		0
Revolving Loans		0		0
Revolving Loans Converted to Term Loans		0		0
Total		1		1
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		0
Revolving Loans		1		1
Revolving Loans Converted to Term Loans		0		0
Total		1		1
Residential Mortgage and Consumer
Financing Receivable, Modifications
Year One		3,841		15,344
Year Two		14,317		8,094
Year Three		7,482		3,845
Year Four		3,391		1,542
Year Five		1,349		1,475
Prior		5,964		4,728
Revolving Loans		6,412		6,586
Revolving Loans Converted to Term Loans		26		14
Total		42,782		41,628
Residential Mortgage and Consumer | Performing
Financing Receivable, Modifications
Year One		3,841		15,344
Year Two		14,315		8,082
Year Three		7,471		3,839
Year Four		3,384		1,537
Year Five		1,342		1,470
Prior		5,871		4,687
Revolving Loans		6,322		6,495
Revolving Loans Converted to Term Loans		25		13
Total		42,571		41,467
Residential Mortgage and Consumer | Performing | Current
Financing Receivable, Modifications
Year One		3,837		15,312
Year Two		14,277		8,051
Year Three		7,440		3,803
Year Four		3,354		1,512
Year Five		1,323		1,450
Prior		5,834		4,615
Revolving Loans		6,267		6,438
Revolving Loans Converted to Term Loans		25		12
Total		42,357		41,193
Residential Mortgage and Consumer | Performing | 30-89 days past due
Financing Receivable, Modifications
Year One		4		30
Year Two		35		27
Year Three		28		29
Year Four		27		20
Year Five		17		10
Prior		25		19
Revolving Loans		41		42
Revolving Loans Converted to Term Loans		0		1
Total		177		178
Residential Mortgage and Consumer | Performing | 90 days or more past due
Financing Receivable, Modifications
Year One		0		2
Year Two		3		4
Year Three		3		7
Year Four		3		5
Year Five		2		10
Prior		12		53
Revolving Loans		14		15
Revolving Loans Converted to Term Loans		0		0
Total		37		96
Residential Mortgage and Consumer | Nonperforming
Financing Receivable, Modifications
Year One		0		0
Year Two		2		12
Year Three		11		6
Year Four		7		5
Year Five		7		5
Prior		93		41
Revolving Loans		90		91
Revolving Loans Converted to Term Loans		1		1
Total		$ 211		$ 161

[1] Includes $145 and $154 of residential mortgage loans measured at fair value at March 31, 2022 and December 31, 2021, respectively.

[2] Includes $24 and $24 of other short-term investments, $266 and $322 of portfolio loans and leases, $(2) and $(2) of ALLL, $2 and $2 of other assets, an immaterial amount and $1 of other liabilities, and $209 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2022 and December 31, 2021, respectively. For further information, refer to Note 11.