Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) - USD ($) $ in Millions	Dec. 31, 2015		Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 92,415	[1]	$ 89,976	[2]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	56,156		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	42,131		40,765
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,659		3,834
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,298		3,565
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,214		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,854		3,720
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	52,130		50,285
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	38,756		38,013
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,344		3,430
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,105		3,198
Pass | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,201		1,966
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,724		3,678
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,917		1,639
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,633		1,352
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	124		137
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	63		76
Special Mention | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	4		65
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Total loans and leases	93		9
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	2,109		2,022
Risk Level, Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,742		1,400
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	191		267
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases	130		284
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications [Line Items]
Total loans and leases	9		38
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 37		33
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases			7
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications [Line Items]
Total loans and leases			$ 7

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

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