Credit Quality (Summary of the ALLL and Related Loans and Leases Classified by Portfolio Segment) (Detail) - USD ($) $ in Millions	Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	$ 210	[1]			$ 235	[2]
Collectively evaluated for impairment	972	[1]			922	[2]
Unallocated	117	[1]			115	[2]
Total allowance for loan and lease losses	1,299	[1],[3]	$ 1,295		1,272	[2],[3]	$ 1,293	$ 1,300	$ 1,322
Individually evaluated for impairment	2,059	[4]			1,869	[5]
Collectively evaluated for impairment	91,693	[4]			90,544	[5]
Loans acquired with deteriorated credit quality	3	[4]			2	[5]
Total portfolio loans and leases	93,755	[4],[6]			92,415	[5]
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	97	[1],[7]			119	[2],[8]
Collectively evaluated for impairment	776	[1]			721	[2]
Total allowance for loan and lease losses	873	[1]	867	[1]	840	[2]	855	852	875
Individually evaluated for impairment	1,011	[4],[7]			815	[5],[8]
Collectively evaluated for impairment	57,106	[4]			55,341	[5]
Total portfolio loans and leases	58,117	[4]			56,156	[5]
Residential Mortgage Loans
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	67	[1]			67	[2]
Collectively evaluated for impairment	31	[1]			33	[2]
Total allowance for loan and lease losses	98	[1]	98	[1]	100	[2]	104	103	104
Individually evaluated for impairment	649	[4]			630	[5]
Collectively evaluated for impairment	13,501	[4]			12,917	[5]
Loans acquired with deteriorated credit quality	3	[4]			2	[5]
Total portfolio loans and leases	14,153	[4]			13,549	[5]
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	46	[1]			49	[2]
Collectively evaluated for impairment	165	[1]			168	[2]
Total allowance for loan and lease losses	211	[1]	214	[1]	217	[2]	231	241	237
Individually evaluated for impairment	399	[4]			424	[5]
Collectively evaluated for impairment	21,086	[4]			22,286	[5]
Total portfolio loans and leases	21,485	[4]			22,710	[5]
Unallocated
Financing Receivable, Allowance for Credit Losses
Unallocated	117	[1]			115	[2]
Total allowance for loan and lease losses	$ 117	[1]	$ 116	[1]	$ 115	[2]	$ 103	$ 104	$ 106

[1] Includes $ 3 related to leveraged leases at June 30, 2016 .

[2] Includes $ 5 related to leveraged leases at December 31, 2015 .

[3] Includes $ 128 and $ 152 of cash and due from banks, $ 1,853 and $ 2,537 of portfolio loans and leases , $ (28) and $ (28) of ALLL, $ 11 and $ 14 of other assets, $ 3 and $ 3 of other liabilities , and $ 1,744 and $ 2,487 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2016 and December 31, 2015 , respectively. For further information refer to Note 9 .

[4] Excludes $ 154 of residential mortgage loans measured at fair value, and includes $ 818 of leveraged leases, net of unearned income at June 30, 2016 .

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

[6] Excludes $ 154 of residential mortgage loans measured at fair value at June 30, 2016 .

[7] Includes five restructured loans at June 30, 2016 associated with a consolidated VIE in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with a recorded investment of $ 27 and an ALLL of $ 18 .

[8] Includes five restructured loans at December 31, 2015 associated with a consolidated VIE in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with a recorded investment of $ 2 7 and an ALLL of $ 1 5 .