Credit Quality (Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class) (Detail) - USD ($) $ in Millions	Sep. 30, 2016		Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	$ 92,455	[1],[2]	$ 91,780	[3],[4]
Total Past Due	547	[1]	635	[3]
Total portfolio loans and leases	93,002	[1],[5]	92,415	[3],[6]
90-Days past Due and Still Accruing	76	[1]	75	[3]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	236	[1],[2]	306	[3],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	311	[1],[2]	329	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total portfolio loans and leases	57,483		56,156
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	42,587	[2]	41,996	[4]
Total Past Due	140		135
Total portfolio loans and leases	42,727		42,131
90-Days past Due and Still Accruing	7		7
Commercial Portfolio Segment | Commercial and Industrial Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	31	[2]	55	[4]
Commercial Portfolio Segment | Commercial and Industrial Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	109	[2]	80	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,442	[2]	3,610	[4]
Total Past Due	35		49
Total portfolio loans and leases	3,477		3,659
90-Days past Due and Still Accruing	0		0
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	7	[2]	15	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	28	[2]	34	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,371	[2]	3,262	[4]
Total Past Due	8		36
Total portfolio loans and leases	3,379		3,298
90-Days past Due and Still Accruing	0		0
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	1	[2]	9	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	7	[2]	27	[4]
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,905	[2]	3,214	[4]
Total Past Due	0		0
Total portfolio loans and leases	3,905		3,214
90-Days past Due and Still Accruing	0		0
Commercial Portfolio Segment | Commercial Construction Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	0	[2]	0	[4]
Commercial Portfolio Segment | Commercial Construction Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	0	[2]	0	[4]
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	3,993	[2]	3,850	[4]
Total Past Due	2		4
Total portfolio loans and leases	3,995		3,854
90-Days past Due and Still Accruing	0		0
Commercial Portfolio Segment | Commercial Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	0	[2]	3	[4]
Commercial Portfolio Segment | Commercial Leases | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	2	[2]	1	[4]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	14,388	[1],[2],[7]	13,420	[3],[4],[8]
Total Past Due	106	[1],[7]	129	[3],[8]
Total portfolio loans and leases	14,494	[1],[7]	13,549	[3],[8]
90-Days past Due and Still Accruing	43	[1],[7]	40	[3],[8]
Residential Mortgage | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	32	[1],[2],[7]	37	[3],[4],[8]
Residential Mortgage | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	74	[1],[2],[7]	92	[3],[4],[8]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	7,740	[2]	8,158	[4]
Total Past Due	124		143
Total portfolio loans and leases	7,864		8,301
90-Days past Due and Still Accruing	0		0
Consumer Portfolio Segment | Home Equity | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	65	[2]	82	[4]
Consumer Portfolio Segment | Home Equity | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	59	[2]	61	[4]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	10,266	[2]	11,407	[4]
Total Past Due	83		86
Total portfolio loans and leases	10,349		11,493
90-Days past Due and Still Accruing	8		10
Consumer Portfolio Segment | Automobile Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	72	[2]	75	[4]
Consumer Portfolio Segment | Automobile Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	11	[2]	11	[4]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	2,121	[2]	2,207	[4]
Total Past Due	48		52
Total portfolio loans and leases	2,169		2,259
90-Days past Due and Still Accruing	18		18
Consumer Portfolio Segment | Credit Card | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	27	[2]	29	[4]
Consumer Portfolio Segment | Credit Card | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	21	[2]	23	[4]
Consumer Portfolio Segment | Other Consumer Loans and Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases	642	[2]	656	[4]
Total Past Due	1		1
Total portfolio loans and leases	643		657
90-Days past Due and Still Accruing	0		0
Consumer Portfolio Segment | Other Consumer Loans and Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	1	[2]	1	[4]
Consumer Portfolio Segment | Other Consumer Loans and Leases | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	$ 0	[2]	$ 0	[4]

[1] Excludes $ 149 of residential mortgage loans measured at fair value at September 30, 2016 .

[2] Includes accrual and nonaccrual loans and leases.

[3] Excludes $ 167 of residential mortgage loans measured at fair value at December 31, 2015 .

[4] Includes accrual and nonaccrual loans and leases.

[5] Excludes $ 149 of residential mortgage loans measured at fair value, and includes $ 72 5 of leveraged leases, net of unearned income at September 30, 2016 .

[6] Excludes $ 167 of residential mortgage loans measured at fair value, and includes $ 801 of leveraged leases, net of unearned income at December 31, 2015 .

[7] Information includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the FHA or guaranteed by the VA. As of September 30, 2016 , $ 11 2 of these loans were 30-89 days past due and $ 287 were 90 days or more past due. The Bancorp recognized $ 2 and $ 5 of losses during the three and nine months ended September 30, 2016 , respectively, due to claim denials and curtailments associated with these insured or guaranteed loans.

[8] Information includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the FHA or guaranteed by the VA . As of December 31 , 2015 , $ 102 of these loa ns were 30-89 days past due and $ 335 were 90 days or more past due. The Bancorp recognized $ 2 and $ 6 o f losses during the three and nine months ended September 30, 2015 , respectively, due to claim denials and cu rtailments associated with these insured or guaranteed loans .