Results of Operations and Average Assets by Segment (Detail) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010		Dec. 31, 2010
Segment Reporting Information [Line Items]
Net interest income	$ 869	[1]	$ 887	[1]	$ 1,752	[2]	$ 1,788	[2]
Provision for loan and lease losses	113		325		281		915
Net interest income (loss) after provision for loan and lease losses	756		562		1,471		873
Noninterest income:
Mortgage banking net revenue	162		114		264		266
Service charges on deposits	126		149		250		291
Investment advisory revenue	95		87		193		177
Corporate banking revenue	95		93		181		174
Card and processing revenue	89		84		169		158
Other noninterest income	83		85		164		160
Securities gains, net	6		8		14		21
Securities gains, net - non-qualifying hedges on mortgage servicing rights					5
Total noninterest income	656		620		1,240		1,247
Noninterest expense:
Salaries, wages and incentives	365		356		716		686
Employee benefits	79		73		176		159
Net occupancy expense	75		73		152		150
Technology and communications	48		45		93		90
Card and processing expense	29		31		58		56
Equipment expense	28		31		57		60
Other noninterest expense	277		326		567		690
Total noninterest expense	901		935		1,819		1,891
Income (loss) before income taxes	511		247		892		229
Applicable income tax (benefit) expense	174	[1]	55	[1]	290	[2]	47	[2]
Net Income (Loss)	337		192		602		182
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	337		192		602		182
Dividends on preferred stock	9		62		185		125
Net income (loss) available to common shareholders	328		130		417		57
Total goodwill	2,417		2,417		2,417		2,417		2,417
Total Assets	110,805		112,025		110,805		112,025		111,007
Commercial Banking
Segment Reporting Information [Line Items]
Net interest income	339	[1]	390	[1]	671	[2]	767	[2]
Provision for loan and lease losses	147		188		299		466
Net interest income (loss) after provision for loan and lease losses	192		202		372		301
Noninterest income:
Service charges on deposits	52		47		101		95
Investment advisory revenue	3		3		6		5
Corporate banking revenue	90		89		172		165
Card and processing revenue	10		8		19		16
Other noninterest income	8		17		40		45
Total noninterest income	163		164		338		326
Noninterest expense:
Salaries, wages and incentives	58		53		111		104
Employee benefits	10		9		26		22
Net occupancy expense	5		4		10		8
Technology and communications	3		3		6		6
Card and processing expense	1				2		1
Equipment expense	1		1		1		1
Other noninterest expense	202		171		397		337
Total noninterest expense	280		241		553		479
Income (loss) before income taxes	75		125		157		148
Applicable income tax (benefit) expense	(11)	[1]	9	[1]	(17)	[2]	(19)	[2]
Net Income (Loss)	86		116		174		167
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	86		116		174		167
Net income (loss) available to common shareholders	86		116		174		167
Total goodwill	613		613		613		613
Total Assets	43,567		43,008		43,567		43,008
Branch Banking
Segment Reporting Information [Line Items]
Net interest income	359	[1]	385	[1]	698	[2]	770	[2]
Provision for loan and lease losses	98		125		214		282
Net interest income (loss) after provision for loan and lease losses	261		260		484		488
Noninterest income:
Mortgage banking net revenue	2		3		4		10
Service charges on deposits	73		101		147		193
Investment advisory revenue	29		25		58		51
Corporate banking revenue	4		4		7		7
Card and processing revenue	86		79		163		148
Other noninterest income	19		17		38		34
Total noninterest income	213		229		417		443
Noninterest expense:
Salaries, wages and incentives	116		112		230		218
Employee benefits	33		31		68		61
Net occupancy expense	46		43		92		87
Technology and communications	1		4		2		8
Card and processing expense	28		30		55		54
Equipment expense	13		12		25		24
Other noninterest expense	156		165		321		322
Total noninterest expense	393		397		793		774
Income (loss) before income taxes	81		92		108		157
Applicable income tax (benefit) expense	29	[1]	34	[1]	38	[2]	58	[2]
Net Income (Loss)	52		58		70		99
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	52		58		70		99
Net income (loss) available to common shareholders	52		58		70		99
Total goodwill	1,656		1,656		1,656		1,656
Total Assets	46,976		47,861		46,976		47,861
Consumer Lending
Segment Reporting Information [Line Items]
Net interest income	81	[1]	93	[1]	171	[2]	197	[2]
Provision for loan and lease losses	55		114		149		246
Net interest income (loss) after provision for loan and lease losses	26		(21)		22		(49)
Noninterest income:
Mortgage banking net revenue	160		111		259		255
Other noninterest income	7		11		17		20
Securities gains, net - non-qualifying hedges on mortgage servicing rights					5
Total noninterest income	167		122		281		275
Noninterest expense:
Salaries, wages and incentives	31		40		64		69
Employee benefits	8		8		19		15
Net occupancy expense	2		2		4		3
Technology and communications	1				1		1
Other noninterest expense	105		82		208		158
Total noninterest expense	147		132		296		246
Income (loss) before income taxes	46		(31)		7		(20)
Applicable income tax (benefit) expense	16	[1]	(13)	[1]	2	[2]	(10)	[2]
Net Income (Loss)	30		(18)		5		(10)
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	30		(18)		5		(10)
Net income (loss) available to common shareholders	30		(18)		5		(10)
Total Assets	22,044		21,738		22,044		21,738
Investment Advisors
Segment Reporting Information [Line Items]
Net interest income	28	[1]	36	[1]	56	[2]	74	[2]
Provision for loan and lease losses	4		8		9		21
Net interest income (loss) after provision for loan and lease losses	24		28		47		53
Noninterest income:
Mortgage banking net revenue					1		1
Service charges on deposits	1		2		2		3
Investment advisory revenue	92		84		187		171
Corporate banking revenue	1		1		1		2
Card and processing revenue	1				2		1
Total noninterest income	95		87		193		178
Noninterest expense:
Salaries, wages and incentives	36		33		70		63
Employee benefits	6		6		15		14
Net occupancy expense	3		2		5		5
Technology and communications			1		1		1
Other noninterest expense	59		58		121		114
Total noninterest expense	104		100		212		197
Income (loss) before income taxes	15		15		28		34
Applicable income tax (benefit) expense	5	[1]	5	[1]	10	[2]	12	[2]
Net Income (Loss)	10		10		18		22
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	10		10		18		22
Net income (loss) available to common shareholders	10		10		18		22
Total goodwill	148		148		148		148
Total Assets	6,833		6,451		6,833		6,451
Corporate and Other
Segment Reporting Information [Line Items]
Net interest income	62	[1]	(17)	[1]	156	[2]	(20)	[2]
Provision for loan and lease losses	(191)		(110)		(390)		(100)
Net interest income (loss) after provision for loan and lease losses	253		93		546		80
Noninterest income:
Service charges on deposits			(1)
Corporate banking revenue			(1)		1
Card and processing revenue	(8)		(3)		(15)		(7)
Other noninterest income	49		40		69		61
Securities gains, net	6		8		14		21
Total noninterest income	47		43		69		75
Noninterest expense:
Salaries, wages and incentives	124		118		241		232
Employee benefits	22		19		48		47
Net occupancy expense	19		22		41		47
Technology and communications	43		37		83		74
Card and processing expense			1		1		1
Equipment expense	14		18		31		35
Other noninterest expense	(216)		(125)		(422)		(191)
Total noninterest expense	6		90		23		245
Income (loss) before income taxes	294		46		592		(90)
Applicable income tax (benefit) expense	135	[1]	20	[1]	257	[2]	6	[2]
Net Income (Loss)	159		26		335		(96)
Less: Net income attributable to noncontrolling interest
Net income (loss) attributable to Bancorp	159		26		335		(96)
Dividends on preferred stock	9		62		185		125
Net income (loss) available to common shareholders	150		(36)		150		(221)
Total Assets	(8,615)		(7,033)		(8,615)		(7,033)
Business Intersegment, Eliminations
Noninterest income:
Investment advisory revenue	(29)	[3]	(25)	[4]	(58)	[3]	(50)	[3]
Total noninterest income	(29)		(25)		(58)		(50)
Noninterest expense:
Other noninterest expense	(29)		(25)		(58)		(50)
Total noninterest expense	(29)		(25)		(58)		(50)
Less: Net income attributable to noncontrolling interest

[1] Includes FTE adjustments of $5.

[2] Includes FTE adjustments of $9.

[3] Revenue sharing agreements between Investment Advisors and Branch Banking are eliminated in the Condensed Consolidated Statements of Income.

[4] Revenue sharing agreements between Investment Advisors and Branch Banking are eliminated in the Consolidated Statements of Income.