Credit Quality (Summary of the ALLL and Related Loans and Leases Classified by Portfolio Segment) (Detail) - USD ($) $ in Millions	Jun. 30, 2017		Mar. 31, 2017	Dec. 31, 2016		Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	$ 224	[1]		$ 230	[2]
Collectively evaluated for impairment	892	[1]		911	[2]
Unallocated	110	[1]		112	[2]
Total allowance for loan and lease losses	1,226	[1],[3]	$ 1,238	1,253	[2],[3]	$ 1,299	$ 1,295	$ 1,272
Individually evaluated for impairment	1,751	[4]		1,927	[5]
Collectively evaluated for impairment	89,551	[4]		90,025	[5]
Loans acquired with deteriorated credit quality	2	[4]		3	[5]
Total portfolio loans and leases	91,304	[4],[6]		91,955	[5],[7]
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	118	[1],[8]		118	[2],[9]
Collectively evaluated for impairment	699	[1]		713	[2]
Unallocated	0	[1]		0	[2]
Total allowance for loan and lease losses	817	[1]	826	831	[2]	873	867	840
Individually evaluated for impairment	760	[4],[8]		904	[5],[9]
Collectively evaluated for impairment	55,545	[4]		55,548	[5]
Loans acquired with deteriorated credit quality	0	[4]		0	[5]
Total portfolio loans and leases	56,305	[4]		56,452	[5]
Residential Mortgage Loans
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	66	[1]		68	[2]
Collectively evaluated for impairment	27	[1]		28	[2]
Unallocated	0	[1]		0	[2]
Total allowance for loan and lease losses	93	[1]	96	96	[2]	98	98	100
Individually evaluated for impairment	652	[4]		652	[5]
Collectively evaluated for impairment	14,664	[4]		14,253	[5]
Loans acquired with deteriorated credit quality	2	[4]		3	[5]
Total portfolio loans and leases	15,318	[4]		14,908	[5]
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	40	[1]		44	[2]
Collectively evaluated for impairment	166	[1]		170	[2]
Unallocated	0	[1]		0	[2]
Total allowance for loan and lease losses	206	[1]	204	214	[2]	211	214	217
Individually evaluated for impairment	339	[4]		371	[5]
Collectively evaluated for impairment	19,342	[4]		20,224	[5]
Loans acquired with deteriorated credit quality	0	[4]		0	[5]
Total portfolio loans and leases	19,681	[4]		20,595	[5]
Unallocated
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	0	[1]		0	[2]
Collectively evaluated for impairment	0	[1]		0	[2]
Unallocated	110	[1]		112	[2]
Total allowance for loan and lease losses	110	[1]	$ 112	112	[2]	$ 117	$ 116	$ 115
Individually evaluated for impairment	0	[4]		0	[5]
Collectively evaluated for impairment	0	[4]		0	[5]
Loans acquired with deteriorated credit quality	0	[4]		0	[5]
Total portfolio loans and leases	$ 0	[4]		$ 0	[5]

[1] Includes $ 2 related to leveraged leases at June 30, 2017 .

[2] Includes $ 2 related to leveraged leases at December 31, 2016 .

[3] Includes $ 57 and $ 85 of cash and due from banks, $ 737 and $ 1,216 of portfolio loans and leases , $ (24) and $ (26) of ALLL, $ 7 and $ 9 of other assets, $ 1 and $ 3 of other liabilities , and $ 618 and $ 1,094 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2017 and December 31, 2016 , respectively. For further information refer to Note 10 .

[4] Excludes $ 142 of residential mortgage loans measured at fair value and includes $ 7 06 of leveraged leases, net of unearned income at June 30, 2017 .

[5] Excludes $ 143 of residential mortga ge loans measured at fair value and includes $ 701 of leveraged leases, net of unearned income at December 31, 2016 .

[6] Excludes $ 142 of residential mortgage loans measured at fair value at June 30, 2017 .

[7] Excludes $ 143 of residential mortgage loans measured at fair value at December 31, 2016 .

[8] Includes five restructured loans at June 30, 2017 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 $ 26 and an ALLL of $ 18 .

[9] Includes five restructured loans at December 31, 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 $ 26 and an ALLL of $ 18 .