Credit Quality (Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class) (Detail) - USD ($) $ in Millions	Jun. 30, 2017		Dec. 31, 2016
Financing Receivable, Modifications
Total loans and leases	$ 91,304	[1],[2]	$ 91,955	[3],[4]
Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	56,305		56,452
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	40,914		41,676
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,385		3,360
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,483		3,539
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	4,366		3,903
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	4,157		3,974
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	53,207		53,274
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	38,281		38,844
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,207		3,168
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,358		3,466
Pass | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	4,320		3,902
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	4,041		3,894
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,389		1,335
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,151		1,204
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	76		72
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	31		4
Special Mention | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	46		1
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	85		54
Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,687		1,816
Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,460		1,604
Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	102		117
Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	94		69
Substandard | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	0		0
Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	31		26
Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	22		27
Doubtful | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	22		24
Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	0		3
Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	0		0
Doubtful | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	0		0
Doubtful | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	$ 0		$ 0

[1] 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 .

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

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

[4] 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 .