Credit Quality (Summary of the ALLL and Related Loans and Leases Classified by Portfolio Segment) (Detail) - USD ($) $ in Millions	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	$ 230	[1]	$ 235	[2]
Collectively evaluated for impairment	911	[1]	922	[2]
Unallocated	112	[1]	115	[2]
Total allowance for loan and lease losses	1,253	[3]	1,272	[3]	$ 1,322	$ 1,582
Individually evaluated for impairment	1,927	[4]	1,869	[5]
Collectively evaluated for impairment	90,025	[4]	90,544	[5]
Loans acquired with deteriorated credit quality	3	[4]	2	[5]
Total portfolio loans and leases	91,955	[6]	92,415	[7]
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	118	[1],[8]	119	[2],[9]
Collectively evaluated for impairment	713	[1]	721	[2]
Unallocated	0	[1]	0	[2]
Total allowance for loan and lease losses	831	[1]	840	[2]	875	1,058
Individually evaluated for impairment	904	[4],[8]	815	[5],[9]
Collectively evaluated for impairment	55,548	[4]	55,341	[5]
Loans acquired with deteriorated credit quality	0	[4]	0	[5]
Total portfolio loans and leases	56,452	[4]	56,156	[5]
Residential Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	68	[1]	67	[2]
Collectively evaluated for impairment	28	[1]	33	[2]
Unallocated	0	[1]	0	[2]
Total allowance for loan and lease losses	96	[1]	100	[2]	104	189
Individually evaluated for impairment	652	[4]	630	[5]
Collectively evaluated for impairment	14,253	[4]	12,917	[5]
Loans acquired with deteriorated credit quality	3	[4]	2	[5]
Total portfolio loans and leases	14,908	[4]	13,549	[5]
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Individually evaluated for impairment	44	[1]	49	[2]
Collectively evaluated for impairment	170	[1]	168	[2]
Unallocated	0	[1]	0	[2]
Total allowance for loan and lease losses	214	[1]	217	[2]	237	225
Individually evaluated for impairment	371	[4]	424	[5]
Collectively evaluated for impairment	20,224	[4]	22,286	[5]
Loans acquired with deteriorated credit quality	0	[4]	0	[5]
Total portfolio loans and leases	20,595	[4]	22,710	[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	112	[1]	115	[2]
Total allowance for loan and lease losses	112	[1]	115	[2]	$ 106	$ 110
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 December 31, 2016 .

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

[3] Includes $ 85 and $ 152 of cash and due from banks, $ 1,216 and $ 2,537 of portfolio loans and leases, $ (26) and $ (28) of ALLL, $ 9 and $ 14 of other assets, $ 3 and $ 3 of other liabilities and $ 1,094 and $ 2,487 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2016 and 2015 , respectively. For further information, refer to Note 11.

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

[5] Excludes $ 167 of residential mortgage loans measured at fair value , and includes $ 8 01 of leveraged leases, net of unearned income at December 31, 2015 .

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

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

[8] 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 .

[9] 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 $ 27 and an ALLL of $ 15 .