Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) - USD ($) $ in Millions		Mar. 31, 2016		Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		$ 92,817	[1],[2]	$ 91,780	[3],[4]
Total Past Due		628	[1]	635	[3]
Total Loans and Leases		93,445	[1]	92,415	[3]
90-Days past Due and Still Accruing		73	[1]	75	[3]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		242	[1],[2]	306	[3],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		386	[1],[2]	329	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans and Leases		57,681		56,156
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		43,255	[2]	41,996	[4]
Total Past Due		178		135
Total Loans and Leases		43,433		42,131
90-Days past Due and Still Accruing		3		7
Commercial Portfolio Segment | Commercial and Industrial Loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
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 [Line Items]
Total Past Due		147	[2]	80	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,580	[2]	3,610	[4]
Total Past Due		33		49
Total Loans and Leases		3,613		3,659
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		6	[2]	15	[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		27	[2]	34	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,210	[2]	3,262	[4]
Total Past Due		41		36
Total Loans and Leases		3,251		3,298
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		17	[2]	9	[4]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		24	[2]	27	[4]
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,428	[2]	3,214	[4]
Total Loans and Leases		3,428		3,214
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		3,952	[2]	3,850	[4]
Total Past Due		4		4
Total Loans and Leases		3,956		3,854
Commercial Portfolio Segment | Commercial Leases | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	[4]			3
Commercial Portfolio Segment | Commercial Leases | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		4	[2]	1	[4]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		13,613	[1],[2],[5]	13,420	[3],[4],[6]
Total Past Due		122	[1],[5]	129	[3],[6]
Total Loans and Leases		13,735	[1],[5]	13,549	[3],[6]
90-Days past Due and Still Accruing		44	[1],[5]	40	[3],[6]
Residential Mortgage | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		32	[1],[2],[5]	37	[3],[4],[6]
Residential Mortgage | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		90	[1],[2],[5]	92	[3],[4],[6]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		7,980	[2]	8,158	[4]
Total Past Due		132		143
Total Loans and Leases		8,112		8,301
Consumer Portfolio Segment | Home Equity | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		72	[2]	82	[4]
Consumer Portfolio Segment | Home Equity | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		60	[2]	61	[4]
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		11,060	[2]	11,407	[4]
Total Past Due		68		86
Total Loans and Leases		11,128		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 [Line Items]
Total Past Due		58	[2]	75	[4]
Consumer Portfolio Segment | Automobile Loans | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		10	[2]	11	[4]
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		2,089	[2]	2,207	[4]
Total Past Due		49		52
Total Loans and Leases		2,138		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 [Line Items]
Total Past Due		25	[2]	29	[4]
Consumer Portfolio Segment | Credit Card | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		24	[2]	23	[4]
Consumer Portfolio Segment | Other Consumer Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases		650	[2]	656	[4]
Total Past Due		1		1
Total Loans and Leases		651		657
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 $160 of residential mortgage loans measured at fair value at March 31, 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] 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 March 31, 2016, $95 of these loans were 30-89 days past due and $315 were 90 days or more past due. The Bancorp recognized $2 of losses during the three months ended March 31, 2016 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, 2015, $102 of these loans were 30-89 days past due and $335 were 90 days or more past due. The Bancorp recognized $2 of losses during the three months ended March 31, 2015 due to claim denials and curtailments associated with these insured or guaranteed loans.