Credit Quality (Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class) (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due
Portfolio loans and leases at fair value	$ 143		$ 167
Total Past Due	616	[1]	635	[2]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	315	[1],[3]	306	[2],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	301	[1],[3]	329	[2],[4]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Portfolio loans and leases at fair value	143		167
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Portfolio loans and leases at fair value	143		167
Residential Mortgage Loans | Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due
Losses Due To Claim Denials And Curtailments	6		8
Residential Mortgage Loans | Federal Housing Administration Loan | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	110		102
Residential Mortgage Loans | Federal Housing Administration Loan | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	$ 312		$ 335

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

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

[3] Includes accrual and nonaccrual loans and leases.

[4] Includes accrual and nonaccrual loans and leases .