Credit Quality (Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class) (Detail) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		$ 93,188	[1],[2]	$ 91,780	[3],[4]
Total Past Due		567	[1]	635	[3]
Total portfolio loans and leases		93,755	[1],[5]	92,415	[6]
90-Days past Due and Still Accruing		65	[1]	75	[3]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		246	[1],[2]	306	[3],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		321	[1],[2]	329	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due
Total portfolio loans and leases		58,117		56,156
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		43,415	[2]	41,996	[4]
Total Past Due		143		135
Total portfolio loans and leases		43,558		42,131
90-Days past Due and Still Accruing		2		7
Commercial Portfolio Segment | Commercial and Industrial Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		43	[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		100	[2]	80	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		3,488	[2]	3,610	[4]
Total Past Due		34		49
Total portfolio loans and leases		3,522		3,659
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		9	[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		25	[2]	34	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		3,331	[2]	3,262	[4]
Total Past Due		22		36
Total portfolio loans and leases		3,353		3,298
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	[4]			9
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		22	[2]	27	[4]
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		3,706	[2]	3,214	[4]
Total portfolio loans and leases		3,706		3,214
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		3,975	[2]	3,850	[4]
Total Past Due		3		4
Total portfolio loans and leases		3,978		3,854
Commercial Portfolio Segment | Commercial Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	[4]			3
Commercial Portfolio Segment | Commercial Leases | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3	[2]	1	[4]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		14,039	[1],[2],[7]	13,420	[3],[4],[8]
Total Past Due		114	[1],[7]	129	[3],[8]
Total portfolio loans and leases		14,153	[1],[7]	13,549	[3],[8]
90-Days past Due and Still Accruing		38	[1],[7]	40	[3],[8]
Residential Mortgage | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		33	[1],[2],[7]	37	[3],[4],[8]
Residential Mortgage | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		81	[1],[2],[7]	92	[3],[4],[8]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		7,862	[2]	8,158	[4]
Total Past Due		126		143
Total portfolio loans and leases		7,988		8,301
Consumer Portfolio Segment | Home Equity | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		68	[2]	82	[4]
Consumer Portfolio Segment | Home Equity | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		58	[2]	61	[4]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		10,595	[2]	11,407	[4]
Total Past Due		76		86
Total portfolio loans and leases		10,671		11,493
90-Days past Due and Still Accruing		7		10
Consumer Portfolio Segment | Automobile Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		67	[2]	75	[4]
Consumer Portfolio Segment | Automobile Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		9	[2]	11	[4]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		2,124	[2]	2,207	[4]
Total Past Due		48		52
Total portfolio loans and leases		2,172		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		25	[2]	29	[4]
Consumer Portfolio Segment | Credit Card | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		23	[2]	23	[4]
Consumer Portfolio Segment | Other Consumer Loans and Leases
Financing Receivable, Recorded Investment, Past Due
Current Loans and Leases		653	[2]	656	[4]
Total Past Due		1		1
Total portfolio loans and leases		654		657
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]

[1] Excludes $ 154 of residential mortgage loans measured at fair value at June 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 $ 154 of residential mortgage loans measured at fair value, and includes $ 818 of leveraged leases, net of unearned income at June 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 June 30, 2016 , $ 108 of these loans were 30-89 days past due and $ 284 were 90 days or more past due. The Bancorp recognized $ 1 and $ 3 of losses during the three and six months ended June 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 $ 4 o f losses during the three and six months ended June 30, 2015 , respectively, due to claim denials and cu rtailments associated with these insured or guaranteed loans .