Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	$ 79,207	[1]	$ 75,221
30-89 Days Past Due	519	[1]	791
90 Days and Greater	1,227	[1],[2]	1,433
Total Past Due	1,746	[1]	2,224
Total Loans and Leases	80,953	[1]	77,445	[3],[4]
90-Days past Due and Still Accruing	200	[1]	274
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans and Leases	45,472	[5]	43,462	[4]
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	30,493		26,687
30-89 Days Past Due	49		201
90 Days and Greater	241	[2]	303	[2]
Total Past Due	290		504
Total Loans and Leases	30,783		27,191
90-Days past Due and Still Accruing	4		16
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	5,088		5,151
30-89 Days Past Due	62		50
90 Days and Greater	116	[2]	139	[2]
Total Past Due	178		189
Total Loans and Leases	5,266		5,340
90-Days past Due and Still Accruing	1		8
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	4,649		5,252
30-89 Days Past Due	41		38
90 Days and Greater	182	[2]	215	[2]
Total Past Due	223		253
Total Loans and Leases	4,872		5,505
90-Days past Due and Still Accruing	2		3
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	887		1,831
30-89 Days Past Due	12		72
90 Days and Greater	121	[2]	145	[2]
Total Past Due	133		217
Total Loans and Leases	1,020		2,048
90-Days past Due and Still Accruing	1		3
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	3,521		3,361
30-89 Days Past Due	4		10
90 Days and Greater	6	[2]	7	[2]
Total Past Due	10		17
Total Loans and Leases	3,531		3,378
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	10,149	[3],[6]	8,404	[3],[6]
30-89 Days Past Due	110	[3],[6]	138	[3],[6]
90 Days and Greater	348	[2],[3],[6]	368	[2]
Total Past Due	458	[3],[6]	506	[3],[6]
Total Loans and Leases	10,607	[3],[6]	8,910	[3],[6]
90-Days past Due and Still Accruing	79	[3],[6]	100	[3],[6]
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans and Leases	24,874	[5]	25,073	[4]
Consumer Portfolio Segment | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	10,455		11,220
30-89 Days Past Due	136		148
90 Days and Greater	128	[2]	145	[2]
Total Past Due	264		293
Total Loans and Leases	10,719		11,513
90-Days past Due and Still Accruing	74		89
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	11,744		10,872
30-89 Days Past Due	71		96
90 Days and Greater	12	[2]	15	[2]
Total Past Due	83		111
Total Loans and Leases	11,827		10,983
90-Days past Due and Still Accruing	9		13
Consumer Portfolio Segment | Credit Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	1,873		1,771
30-89 Days Past Due	33		35
90 Days and Greater	72	[2]	90	[2]
Total Past Due	105		125
Total Loans and Leases	1,978		1,896
90-Days past Due and Still Accruing	30		42
Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current Loans and Leases	348		672
30-89 Days Past Due	1		3
90 Days and Greater	1	[2]	6	[2]
Total Past Due	2		9
Total Loans and Leases	$ 350		$ 681

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

[2] Includes accrual and nonaccrual loans and leases.

[3] Excludes $46 of loans measured at fair value.

[4] Excludes $46 of residential mortgage loans measured at fair value, and includes $1,039 of leveraged leases, net of unearned income.

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

[6] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of December 31, 2010, $55 of these loans were 30-89 days past due and $284 were 90 days or more past due. The Bancorp recognized $2 million in losses for the year ended December 31, 2010 due to claim denials and curtailments associated with these advances.