Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		$ 91,780	[1],[2]	$ 89,272	[3],[4]
Total Past Due		635	[1]	704	[3]
Total loans and leases		92,415	[1]	89,976	[3]
90-Days past Due and Still Accruing		75	[1]	87	[3]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		306	[1],[2]	297	[3],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		329	[1],[2]	407	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans and leases		56,156		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		41,996	[2]	40,651	[4]
Total Past Due		135		114
Total loans and leases		42,131		40,765
90-Days past Due and Still Accruing		7
Commercial Portfolio Segment | Commercial and Industrial Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		55	[2]	29	[4]
Commercial Portfolio Segment | Commercial and Industrial Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		80	[2]	85	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,610	[2]	3,774	[4]
Total Past Due		49		60
Total loans and leases		3,659		3,834
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		15	[2]	7	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		34	[2]	53	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,262	[2]	3,537	[4]
Total Past Due		36		28
Total loans and leases		3,298		3,565
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		9	[2]	11	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		27	[2]	17	[4]
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,214	[2]	2,069	[4]
Total loans and leases		3,214		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,850	[2]	3,717	[4]
Total Past Due		4		3
Total loans and leases		3,854		3,720
Commercial Portfolio Segment | Commercial Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		3	[2]	3	[4]
Commercial Portfolio Segment | Commercial Leases | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[2]	1
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		13,420	[1],[2],[5]	12,109	[3],[4],[6]
Total Past Due		129	[1],[5]	172	[3],[6]
Total loans and leases		13,549	[1],[5]	12,281	[3],[6]
90-Days past Due and Still Accruing		40	[1],[5]	56	[3],[6]
Residential Mortgage | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		37	[1],[2],[5]	38	[3],[4],[6]
Residential Mortgage | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		92	[1],[2],[5]	134	[3],[4],[6]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		8,158	[2]	8,710	[4]
Total Past Due		143		176
Total loans and leases		8,301		8,886
Consumer Portfolio Segment | Home Equity | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		82	[2]	100	[4]
Consumer Portfolio Segment | Home Equity | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		61	[2]	76	[4]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		11,407	[2]	11,953	[4]
Total Past Due		86		84
Total loans and leases		11,493		12,037
90-Days past Due and Still Accruing		10		8
Consumer Portfolio Segment | Automobile Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		75	[2]	74	[4]
Consumer Portfolio Segment | Automobile Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		11	[2]	10	[4]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		2,207	[2]	2,335	[4]
Total Past Due		52		66
Total loans and leases		2,259		2,401
90-Days past Due and Still Accruing		18		23
Consumer Portfolio Segment | Credit Card | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		29	[2]	34	[4]
Consumer Portfolio Segment | Credit Card | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		23	[2]	32	[4]
Consumer Portfolio Segment | Other Consumer Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		656	[2]	417	[4]
Total Past Due		1		1
Total loans and leases		657		418
Consumer Portfolio Segment | Other Consumer Loans and Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		$ 1	[2]	$ 1	[4]

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

[2] Includes accrual and nonaccrual loans and leases.

[3] Excludes $108 of residential mortgage loans measured at fair value at December 31, 2014.

[4] Includes accrual and nonaccrual loans and leases.

[5] 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 loans were 30-89 days past due and $335 were 90 days or more past due. The Bancorp recognized $8 of losses during the year ended December 31, 2015 due to claim denials and curtailments associated with these insured or guaranteed loans.

[6] 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, 2014, $99 of these loans were 30-89 days past due and $373 were 90 days or more past due. The Bancorp recognized $14 of losses during the year ended December 31, 2014 due to claim denials and curtailments associated with these insured or guaranteed loans.