Operating Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Net interest income (expense)	$ 1,349		$ 1,417		$ 4,039		$ 4,254
Allocated provision for loan and lease losses	34		92		168		532
Noninterest income	936		905		2,780		2,952
Noninterest expense	1,556		1,471		4,510		4,381
Amortization of intangibles	23		26		69		80
Income before income taxes	695		759		2,141		2,293
Provision (benefit) for income taxes	134		450		524		1,152
Segment net income (loss)	561		309		1,617		1,141
Identifiable assets (period end)	187,022				187,022				183,010
Community Banking [Member]
Net interest income (expense)	437		431		1,291		1,280
Net intersegment interest income (expense)	296		326		893		1,018
Segment net interest income	733		757		2,184		2,298
Allocated provision for loan and lease losses	52		46		103		271
Noninterest income	322		321		933		918
Intersegment net referral fees (expense)	31		42		86		147
Noninterest expense	380		409		1,171		1,279
Amortization of intangibles	6		9		22		28
Allocated corporate expenses	285		260		853		780
Income before income taxes	363		396		1,054		1,005
Provision (benefit) for income taxes	132		146		385		368
Segment net income (loss)	231		250		669		637
Identifiable assets (period end)	55,114		55,190		55,114		55,190
Residential Mortgage Banking [Member]
Net interest income (expense)	372		397		1,125		1,196
Net intersegment interest income (expense)	(246)		(247)		(747)		(749)
Segment net interest income	126		150		378		447
Allocated provision for loan and lease losses	(48)		(29)		(69)		(6)
Noninterest income	82		96		210		408
Intersegment net referral fees (expense)	0		(1)		1		(1)
Noninterest expense	107		96		399		272
Amortization of intangibles	0		0		0		0
Allocated corporate expenses	21		17		63		50
Income before income taxes	128		161		196		538
Provision (benefit) for income taxes	48		61		74		204
Segment net income (loss)	80		100		122		334
Identifiable assets (period end)	35,778		37,436		35,778		37,436
Dealer Financial Services [Member]
Net interest income (expense)	212		210		621		625
Net intersegment interest income (expense)	(41)		(39)		(118)		(118)
Segment net interest income	171		171		503		507
Allocated provision for loan and lease losses	53		48		157		157
Noninterest income	0		1		1		4
Intersegment net referral fees (expense)	0		0		0		0
Noninterest expense	29		28		86		82
Amortization of intangibles	0		0		0		0
Allocated corporate expenses	7		7		21		22
Income before income taxes	82		89		240		250
Provision (benefit) for income taxes	31		33		91		95
Segment net income (loss)	51		56		149		155
Identifiable assets (period end)	12,514		11,503		12,514		11,503
Specialized Lending [Member]
Net interest income (expense)	149		181		430		533
Net intersegment interest income (expense)	(38)		(33)		(106)		(95)
Segment net interest income	111		148		324		438
Allocated provision for loan and lease losses	4		1		26		80
Noninterest income	63		58		163		164
Intersegment net referral fees (expense)	0		0		0		0
Noninterest expense	56		72		159		200
Amortization of intangibles	1		1		3		4
Allocated corporate expenses	15		17		44		49
Income before income taxes	98		115		255		269
Provision (benefit) for income taxes	27		33		65		69
Segment net income (loss)	71		82		190		200
Identifiable assets (period end)	17,536		17,076		17,536		17,076
Insurance Services [Member]
Net interest income (expense)	0		1		1		2
Net intersegment interest income (expense)	1		2		4		5
Segment net interest income	1		3		5		7
Allocated provision for loan and lease losses	0		0		0		0
Noninterest income	387		357		1,242		1,150
Intersegment net referral fees (expense)	0		0		0		0
Noninterest expense	297		287		908		867
Amortization of intangibles	13		16		40		46
Allocated corporate expenses	21		14		57		43
Income before income taxes	57		43		242		201
Provision (benefit) for income taxes	21		16		74		68
Segment net income (loss)	36		27		168		133
Identifiable assets (period end)	2,736		2,876		2,736		2,876
Financial Services [Member]
Net interest income (expense)	46		42		133		127
Net intersegment interest income (expense)	66		70		193		213
Segment net interest income	112		112		326		340
Allocated provision for loan and lease losses	4		(1)		7		21
Noninterest income	186		179		552		539
Intersegment net referral fees (expense)	8		9		21		27
Noninterest expense	157		150		470		456
Amortization of intangibles	1		1		2		2
Allocated corporate expenses	30		24		90		74
Income before income taxes	114		126		330		353
Provision (benefit) for income taxes	43		47		124		132
Segment net income (loss)	71		79		206		221
Identifiable assets (period end)	12,033		11,051		12,033		11,051
Other Treasury And Corporate [Member]
Net interest income (expense)	133	[1]	155	[1]	438	[1]	491	[1]
Net intersegment interest income (expense)	(38)	[1]	(79)	[1]	(119)	[1]	(274)	[1]
Segment net interest income	95	[1]	76	[1]	319	[1]	217	[1]
Allocated provision for loan and lease losses	(31)	[1]	27	[1]	(56)		9
Noninterest income	(104)	[1]	(107)	[1]	(321)	[1]	(231)	[1]
Intersegment net referral fees (expense)	(39)	[1]	(50)	[1]	(108)	[1]	(173)	[1]
Noninterest expense	507	[1]	403	[1]	1,248		1,145
Amortization of intangibles	2	[1]	(1)	[1]	2		0
Allocated corporate expenses	(379)	[1]	(339)	[1]	(1,128)		(1,018)
Income before income taxes	(147)	[1]	(171)	[1]	(176)	[1]	(323)	[1]
Provision (benefit) for income taxes	(168)	[1]	114	[1]	(289)	[1]	216	[1]
Segment net income (loss)	21	[1]	(285)	[1]	113	[1]	(539)	[1]
Identifiable assets (period end)	51,311	[1]	46,576	[1]	51,311	[1]	46,576	[1]
Total Bbt Corporation [Member]
Net interest income (expense)	1,349		1,417		4,039		4,254
Net intersegment interest income (expense)	0		0		0		0
Segment net interest income	1,349		1,417		4,039		4,254
Allocated provision for loan and lease losses	34		92		168		532
Noninterest income	936		905		2,780		2,952
Intersegment net referral fees (expense)	0		0		0		0
Noninterest expense	1,533		1,445		4,441		4,301
Amortization of intangibles	23		26		69		80
Allocated corporate expenses	0		0		0		0
Income before income taxes	695		759		2,141		2,293
Provision (benefit) for income taxes	134		450		524		1,152
Segment net income (loss)	561		309		1,617		1,141
Identifiable assets (period end)	$ 187,022		$ 181,708		$ 187,022		$ 181,708

[1] Includes financial data from subsidiaries below the quantitative and qualitative thresholds requiring disclosure.