Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	$ 85,706	[1],[2]	$ 80,953	[3],[4],[5]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	49,388	[6]	45,472	[3]
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	36,038		30,783
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	4,876		5,266
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	4,227		4,872
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	698		1,020
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	3,549		3,531
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	44,340		38,197
Pass | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	33,521		27,199
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	3,934		3,893
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	2,958		3,328
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	444		343
Pass | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	3,483		3,434
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	2,007		3,016
Special Mention | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	1,113		1,641
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	338		567
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	449		521
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	59		235
Special Mention | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	48		52
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	3,010		4,050
Risk Level, Substandard | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	1,379		1,831
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	603		778
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	815		984
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	195		413
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	18		44
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	31		209
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	25		112
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	1		28
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net	5		39
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Notes Receivable Net			29
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Notes Receivable Net			$ 1

[1] Excludes $76 of loans measured at fair value.

[2] Includes an immaterial amount of government insured commercial loans 30-89 days and 90 days past due and accruing whose repayments are insured by the Small Business Administration at December 31, 2012.

[3] Excludes $65 of residential mortgage loans measured at fair value, and includes $1,022 of leveraged leases, net of unearned income.

[4] Excludes $65 of loans measured at fair value.

[5] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the Small Business Administration at December 31, 2011.

[6] Excludes $76 of residential mortgage loans measured at fair value, and includes $862 of leveraged leases, net of unearned income.