Results of Operations and Average Assets by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Segment Reporting Information
Net interest income	$ 3,533		$ 3,579		$ 3,561
Provision for loan and lease losses	396		315		229
Net interest income after provision for loan and lease losses	3,137		3,264		3,332
Total noninterest income	3,003		2,473		3,227
Total noninterest expense	3,775		3,709		3,961
Income Before Income Taxes	2,365		2,028		2,598
Applicable income tax benefit	659		545		772
Net income (loss)	1,706		1,483		1,826
Less: Net income attributable to noncontrolling interests	(6)		2		(10)
Net income attributable to Bancorp	1,712		1,481		1,836
Dividends on preferred stock	75		67		37
Net income available to common shareholders	1,637		1,414		1,799
Total goodwill	2,416		2,416		2,416
Total Assets	141,082		138,706		130,443
Commercial Banking
Segment Reporting Information
Net interest income	1,625		1,627		1,569
Provision for loan and lease losses	239		235		195
Net interest income after provision for loan and lease losses	1,386		1,392		1,374
Total noninterest income	853	[1]	880		811
Total noninterest expense	1,402		1,317		1,230
Income Before Income Taxes	837		955		955
Applicable income tax benefit	98		155		157
Net income (loss)	739		800		798
Net income attributable to Bancorp	739		800		798
Net income available to common shareholders	739		800		798
Total goodwill	613		613		613
Total Assets	58,166		56,306		54,495
Branch Banking
Segment Reporting Information
Net interest income	1,555		1,573		1,380
Provision for loan and lease losses	159		181		211
Net interest income after provision for loan and lease losses	1,396		1,392		1,169
Total noninterest income	652	[2]	726	[3]	745	[4]
Total noninterest expense	1,567		1,554		1,576
Income Before Income Taxes	481		564		338
Applicable income tax benefit	170		199		119
Net income (loss)	311		365		219
Net income attributable to Bancorp	311		365		219
Net income available to common shareholders	311		365		219
Total goodwill	1,655		1,655		1,655
Total Assets	53,587		51,462		47,788
Consumer Lending
Segment Reporting Information
Net interest income	249		258		312
Provision for loan and lease losses	45		156		93
Net interest income after provision for loan and lease losses	204		102		219
Total noninterest income	407		350		755
Total noninterest expense	436		554		685
Income Before Income Taxes	175		(102)		289
Applicable income tax benefit	63		(36)		102
Net income (loss)	112		(66)		187
Net income attributable to Bancorp	112		(66)		187
Net income available to common shareholders	112		(66)		187
Total Assets	22,656		22,567		22,624
Investment Advisors
Segment Reporting Information
Net interest income	128		121		154
Provision for loan and lease losses	3		3		2
Net interest income after provision for loan and lease losses	125		118		152
Total noninterest income	418		410		406
Total noninterest expense	455		445		453
Income Before Income Taxes	88		83		105
Applicable income tax benefit	30		29		37
Net income (loss)	58		54		68
Net income attributable to Bancorp	58		54		68
Net income available to common shareholders	58		54		68
Total goodwill	148		148		148
Total Assets	9,938		10,443		10,711
General Corporate and Other
Segment Reporting Information
Net interest income	(24)				146
Provision for loan and lease losses	(50)		(260)		(272)
Net interest income after provision for loan and lease losses	26		260		418
Total noninterest income	822		253		654
Total noninterest expense	64		(15)		161
Income Before Income Taxes	784		528		911
Applicable income tax benefit	298		198		357
Net income (loss)	486		330		554
Less: Net income attributable to noncontrolling interests	(6)		2		(10)
Net income attributable to Bancorp	492		328		564
Dividends on preferred stock	75		67		37
Net income available to common shareholders	417		261		527
Total Assets	(3,265)		(2,072)		(5,175)
Intersegment Elimination
Segment Reporting Information
Total noninterest income	(149)	[5]	(146)	[6]	(144)	[7]
Total noninterest expense	$ (149)		$ (146)		$ (144)

[1] Includes an impairment charge of $36 for operating lease equipment. For more information refer to Note 8 and Note 27.

[2] Includes an impairment charge of $109 for branches and land. For more information refer to Note 7 and Note 27.

[3] Includes an impairment charge of $20 for branches and land. For more information refer to Note 7 and Note 27.

[4] Includes an impairment charge of $6 for branches and land. For more information refer to Note 7 and Note 27.

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

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

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