Segments (Results of Operations and Average Assets by Segment) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Segment Reporting Information
Net interest income	$ 3,615		$ 3,533		$ 3,579
Provision for (benefit from) loan and lease losses	343		396		315
Net interest income after provision for loan and lease losses	3,272		3,137		3,264
Total noninterest income	2,696		3,003		2,473
Total noninterest expense	3,903		3,775		3,709
Income (Loss) Before Income Taxes	2,065		2,365		2,028
Applicable income tax expense (benefit)	505		659		545
Net income (loss)	1,560		1,706		1,483
Less: Net income attributable to noncontrolling interests	(4)		(6)		2
Net income (loss) attributable to Bancorp	1,564		1,712		1,481
Dividends on preferred stock	75		75		67
Net income (loss) available to common shareholders	1,489		1,637		1,414
Total goodwill	2,416		2,416		2,416
Total Assets	142,177		141,048	[1],[2]	138,670	[3]
Intersegment Elimination
Segment Reporting Information
Total noninterest income	(131)	[4]	(149)	[5]	(146)	[6]
Total noninterest expense	(131)		(149)		(146)
Commercial Banking
Segment Reporting Information
Net interest income	1,814		1,625		1,627
Provision for (benefit from) loan and lease losses	76		298		141
Net interest income after provision for loan and lease losses	1,738		1,327		1,486
Total noninterest income	907	[7]	853	[8]	880
Total noninterest expense	1,426		1,369		1,281
Income (Loss) Before Income Taxes	1,219		811		1,085
Applicable income tax expense (benefit)	224		93		201
Net income (loss)	995		718		884
Less: Net income attributable to noncontrolling interests	0		0		0
Net income (loss) attributable to Bancorp	995		718		884
Dividends on preferred stock	0		0		0
Net income (loss) available to common shareholders	995		718		884
Total goodwill	613		613		613
Total Assets	58,092		58,105	[2]	56,400	[3]
Branch Banking
Segment Reporting Information
Net interest income	1,669		1,555		1,573
Provision for (benefit from) loan and lease losses	138		151		171
Net interest income after provision for loan and lease losses	1,531		1,404		1,402
Total noninterest income	755	[9]	652	[10]	726	[11]
Total noninterest expense	1,621		1,598		1,587
Income (Loss) Before Income Taxes	665		458		541
Applicable income tax expense (benefit)	234		161		191
Net income (loss)	431		297		350
Less: Net income attributable to noncontrolling interests	0		0		0
Net income (loss) attributable to Bancorp	431		297		350
Dividends on preferred stock	0		0		0
Net income (loss) available to common shareholders	431		297		350
Total goodwill	1,655		1,655		1,655
Total Assets	55,940		53,609	[2]	51,488	[3]
Consumer Lending
Segment Reporting Information
Net interest income	248		249		258
Provision for (benefit from) loan and lease losses	44		44		156
Net interest income after provision for loan and lease losses	204		205		102
Total noninterest income	303		407		350
Total noninterest expense	475		440		558
Income (Loss) Before Income Taxes	32		172		(106)
Applicable income tax expense (benefit)	12		61		(37)
Net income (loss)	20		111		(69)
Less: Net income attributable to noncontrolling interests	0		0		0
Net income (loss) attributable to Bancorp	20		111		(69)
Dividends on preferred stock	0		0		0
Net income (loss) available to common shareholders	20		111		(69)
Total goodwill	0		0		0
Total Assets	22,041		22,656	[2]	22,567	[3]
Wealth and Asset Management
Segment Reporting Information
Net interest income	168		128		121
Provision for (benefit from) loan and lease losses	1		3		1
Net interest income after provision for loan and lease losses	167		125		120
Total noninterest income	399		418		410
Total noninterest expense	422		455		443
Income (Loss) Before Income Taxes	144		88		87
Applicable income tax expense (benefit)	51		30		29
Net income (loss)	93		58		58
Less: Net income attributable to noncontrolling interests	0		0		0
Net income (loss) attributable to Bancorp	93		58		58
Dividends on preferred stock	0		0		0
Net income (loss) available to common shareholders	93		58		58
Total goodwill	148		148		148
Total Assets	9,487		9,939	[2]	10,445	[3]
General Corporate and Other
Segment Reporting Information
Net interest income	(284)		(24)		0
Provision for (benefit from) loan and lease losses	84		(100)		(154)
Net interest income after provision for loan and lease losses	(368)		76		154
Total noninterest income	463		822		253
Total noninterest expense	90		62		(14)
Income (Loss) Before Income Taxes	5		836		421
Applicable income tax expense (benefit)	(16)		314		161
Net income (loss)	21		522		260
Less: Net income attributable to noncontrolling interests	(4)		(6)		2
Net income (loss) attributable to Bancorp	25		528		258
Dividends on preferred stock	75		75		67
Net income (loss) available to common shareholders	(50)		453		191
Total goodwill	0		0		0
Total Assets	$ (3,383)	[12]	$ (3,261)	[2],[13]	$ (2,230)	[3],[14]

[1] Upon adoption of ASU 2015-03 on January 1, 2016, the December 31, 2015 Consolidated Balance Sheet was adjusted to reflect the reclassification of $34 of debt issuance costs from other assets to long-term debt. For further inform ation refer to Note 1 .

[2] Upon adoption of ASU 2015-03 on January 1, 2016, the December 31, 2015 Consolidated Balance Sheet was adjusted to reflect the reclassification of $ 34 of debt issuance costs from other assets to long-term debt. For further information, refer to Note 1.

[3] Upon adoption of ASU 2015-03 on January 1, 2016, the December 31, 2014 Consolidated Balance Sheet was adjusted t o reflect the reclassification of $ 3 6 of debt issuance costs from other assets to long-term debt. For further information, refer to Note 1.

[4] Revenue sharing agreements between wealth and asset management and branch b anking are eliminated in the Consolidated Statements of Income .

[5] Reve nue sharing agreements between wealth and asset management and b ranch b anking are eliminated in the Consolidated Statements of Income.

[6] Revenue sharing agreements between wealth and asset management and b ranch b anking are eliminated in the Consolidated Statements of Income.

[7] Includes impairment charge s of $ 20 for operating lease equipment. For more information refer to Note 8 and Note 27.

[8] Includes impairment charges of $ 36 for operating lease equipment. For more information, refer to Note 8 and Not e 27.

[9] Includes impairment charge s of $ 32 for branches and land. For more information refer to Note 7 and Note 27.

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

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

[12] Includes bank premises and equipment of $ 39 classified as held for sale. For more information, refer to Note 7.

[13] Includes bank premises and equipment of $ 81 classified as held for sale. For more information, refer to Note 7.

[14] Includes bank premises and equipment of $ 26 classified as held for sale. For more information, refer to Note 7 .