Credit Quality (Summary of the Credit Risk Profile of the Bancorp's Residential Mortgage and Consumer Portfolio Segments by Class) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Modifications
Total loans and leases	$ 117,852	$ 109,375
Residential Mortgage Loans | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	693
Term Loans, 2019	2,750
Term Loans, 2018	1,335
Term Loans, 2017	2,339
Term Loans, 2016	3,099
Term Loans, prior year	6,300
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	16,516
Consumer Portfolio Segment
Financing Receivable, Modifications
Term Loans, 2020	2,846
Term Loans, 2019	8,826
Term Loans, 2018	4,446
Term Loans, 2017	3,974
Term Loans, 2016	3,841
Term Loans, prior year	7,089
Revolving loans amortized cost basis	8,826
Revolving loans converted to term loans amortized cost basis	9
Total	39,857
Total loans and leases		39,417
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	7
Term Loans, 2019	33
Term Loans, 2018	40
Term Loans, 2017	4
Term Loans, 2016	1
Term Loans, prior year	172
Revolving loans amortized cost basis	5,697
Revolving loans converted to term loans amortized cost basis	9
Total	5,963
Total loans and leases		6,083
Consumer Portfolio Segment | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	1,818
Term Loans, 2019	5,172
Term Loans, 2018	2,448
Term Loans, 2017	1,374
Term Loans, 2016	693
Term Loans, prior year	545
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	12,050
Total loans and leases		11,538
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	2,417
Revolving loans converted to term loans amortized cost basis	0
Total	2,417
Total loans and leases		2,532
Consumer Portfolio Segment | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	328
Term Loans, 2019	871
Term Loans, 2018	623
Term Loans, 2017	257
Term Loans, 2016	48
Term Loans, prior year	72
Revolving loans amortized cost basis	712
Revolving loans converted to term loans amortized cost basis	0
Total	2,911
Total loans and leases		2,723
Performing Financing Receivable
Financing Receivable, Modifications
Total loans and leases		39,196
Performing Financing Receivable | Residential Mortgage Loans | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	693
Term Loans, 2019	2,750
Term Loans, 2018	1,335
Term Loans, 2017	2,338
Term Loans, 2016	3,096
Term Loans, prior year	6,231
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	16,443
Total loans and leases		16,450
Performing Financing Receivable | Residential Mortgage Loans | Current | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	693
Term Loans, 2019	2,748
Term Loans, 2018	1,333
Term Loans, 2017	2,332
Term Loans, 2016	3,088
Term Loans, prior year	6,170
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	16,364
Performing Financing Receivable | Residential Mortgage Loans | 30 to 89 days past due | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	2
Term Loans, 2018	1
Term Loans, 2017	1
Term Loans, 2016	3
Term Loans, prior year	18
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	25
Performing Financing Receivable | Residential Mortgage Loans | 90 days or more past due | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	1
Term Loans, 2017	5
Term Loans, 2016	5
Term Loans, prior year	43
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	54
Performing Financing Receivable | Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	7
Term Loans, 2019	33
Term Loans, 2018	40
Term Loans, 2017	4
Term Loans, 2016	1
Term Loans, prior year	161
Revolving loans amortized cost basis	5,618
Revolving loans converted to term loans amortized cost basis	9
Total	5,873
Total loans and leases		5,989
Performing Financing Receivable | Consumer Portfolio Segment | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	1,818
Term Loans, 2019	5,171
Term Loans, 2018	2,447
Term Loans, 2017	1,372
Term Loans, 2016	691
Term Loans, prior year	543
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	12,042
Total loans and leases		11,531
Performing Financing Receivable | Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	2,388
Revolving loans converted to term loans amortized cost basis	0
Total	2,388
Total loans and leases		2,505
Performing Financing Receivable | Consumer Portfolio Segment | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	328
Term Loans, 2019	871
Term Loans, 2018	623
Term Loans, 2017	257
Term Loans, 2016	48
Term Loans, prior year	72
Revolving loans amortized cost basis	710
Revolving loans converted to term loans amortized cost basis	0
Total	2,909
Total loans and leases		2,721
Performing Financing Receivable | Consumer Portfolio Segment | Current | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	7
Term Loans, 2019	33
Term Loans, 2018	40
Term Loans, 2017	4
Term Loans, 2016	1
Term Loans, prior year	157
Revolving loans amortized cost basis	5,573
Revolving loans converted to term loans amortized cost basis	9
Total	5,824
Performing Financing Receivable | Consumer Portfolio Segment | Current | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	1,816
Term Loans, 2019	5,124
Term Loans, 2018	2,401
Term Loans, 2017	1,343
Term Loans, 2016	677
Term Loans, prior year	529
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	11,890
Performing Financing Receivable | Consumer Portfolio Segment | Current | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	2,305
Revolving loans converted to term loans amortized cost basis	0
Total	2,305
Performing Financing Receivable | Consumer Portfolio Segment | Current | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	328
Term Loans, 2019	864
Term Loans, 2018	616
Term Loans, 2017	253
Term Loans, 2016	47
Term Loans, prior year	71
Revolving loans amortized cost basis	707
Revolving loans converted to term loans amortized cost basis	0
Total	2,886
Performing Financing Receivable | Consumer Portfolio Segment | 30 to 89 days past due | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	4
Revolving loans amortized cost basis	45
Revolving loans converted to term loans amortized cost basis	0
Total	49
Performing Financing Receivable | Consumer Portfolio Segment | 30 to 89 days past due | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	2
Term Loans, 2019	45
Term Loans, 2018	43
Term Loans, 2017	26
Term Loans, 2016	13
Term Loans, prior year	12
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	141
Performing Financing Receivable | Consumer Portfolio Segment | 30 to 89 days past due | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	41
Revolving loans converted to term loans amortized cost basis	0
Total	41
Performing Financing Receivable | Consumer Portfolio Segment | 30 to 89 days past due | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	6
Term Loans, 2018	7
Term Loans, 2017	4
Term Loans, 2016	1
Term Loans, prior year	1
Revolving loans amortized cost basis	3
Revolving loans converted to term loans amortized cost basis	0
Total	22
Performing Financing Receivable | Consumer Portfolio Segment | 90 days or more past due | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	0
Performing Financing Receivable | Consumer Portfolio Segment | 90 days or more past due | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	2
Term Loans, 2018	3
Term Loans, 2017	3
Term Loans, 2016	1
Term Loans, prior year	2
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	11
Performing Financing Receivable | Consumer Portfolio Segment | 90 days or more past due | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	42
Revolving loans converted to term loans amortized cost basis	0
Total	42
Performing Financing Receivable | Consumer Portfolio Segment | 90 days or more past due | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	1
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	1
Nonperforming Financing Receivable
Financing Receivable, Modifications
Total loans and leases		221
Nonperforming Financing Receivable | Residential Mortgage Loans | Residential Mortgage
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	1
Term Loans, 2016	3
Term Loans, prior year	69
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	73
Total loans and leases		91
Nonperforming Financing Receivable | Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	11
Revolving loans amortized cost basis	79
Revolving loans converted to term loans amortized cost basis	0
Total	90
Total loans and leases		94
Nonperforming Financing Receivable | Consumer Portfolio Segment | Indirect secured consumer loans
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	1
Term Loans, 2018	1
Term Loans, 2017	2
Term Loans, 2016	2
Term Loans, prior year	2
Revolving loans amortized cost basis	0
Revolving loans converted to term loans amortized cost basis	0
Total	8
Total loans and leases		7
Nonperforming Financing Receivable | Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	29
Revolving loans converted to term loans amortized cost basis	0
Total	29
Total loans and leases		27
Nonperforming Financing Receivable | Consumer Portfolio Segment | Other Consumer Loans
Financing Receivable, Modifications
Term Loans, 2020	0
Term Loans, 2019	0
Term Loans, 2018	0
Term Loans, 2017	0
Term Loans, 2016	0
Term Loans, prior year	0
Revolving loans amortized cost basis	2
Revolving loans converted to term loans amortized cost basis	0
Total	$ 2
Total loans and leases		$ 2