Operating Segments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net interest income (expense)	$ 5,374	$ 5,616	$ 5,857
Allocated provision for loan and lease losses	251	592	1,057
Noninterest income	3,784	3,937	3,820
Noninterest expense	5,921	5,837	5,828
Amortization of intangibles	91	106	110
Income before income taxes	2,986	3,124	2,792
Provision (benefit) for income taxes	760	1,395	764
Net Income	2,226	1,729	2,028
Identifiable assets (period end)	186,814	183,010
Community Banking [Member]
Net interest income (expense)	1,726	1,712	1,668
Net intersegment interest income (expense)	1,188	1,336	1,565
Segment net interest income	2,914	3,048	3,233
Allocated provision for loan and lease losses	123	279	586
Noninterest income	1,247	1,229	1,169
Intersegment net referral fees (expense)	118	178	190
Noninterest expense	1,535	1,692	1,815
Amortization of intangibles	29	36	37
Allocated corporate expenses	1,137	1,041	1,024
Income before income taxes	1,455	1,407	1,130
Provision (benefit) for income taxes	532	516	412
Net Income	923	891	718
Identifiable assets (period end)	55,494	55,666	56,496
Residential Mortgage Banking [Member]
Net interest income (expense)	1,482	1,584	1,564
Net intersegment interest income (expense)	(984)	(999)	(1,044)
Segment net interest income	498	585	520
Allocated provision for loan and lease losses	(107)	12	174
Noninterest income	310	484	756
Intersegment net referral fees (expense)	2	(1)	0
Noninterest expense	504	370	416
Amortization of intangibles	0	0	0
Allocated corporate expenses	85	68	59
Income before income taxes	328	618	627
Provision (benefit) for income taxes	124	235	238
Net Income	204	383	389
Identifiable assets (period end)	34,463	36,083	37,654
Dealer Financial Services [Member]
Net interest income (expense)	835	834	844
Net intersegment interest income (expense)	(160)	(158)	(195)
Segment net interest income	675	676	649
Allocated provision for loan and lease losses	237	214	164
Noninterest income	2	4	7
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	116	108	101
Amortization of intangibles	0	0	1
Allocated corporate expenses	29	29	36
Income before income taxes	295	329	354
Provision (benefit) for income taxes	112	125	135
Net Income	183	204	219
Identifiable assets (period end)	12,823	11,525	10,264
Specialized Lending [Member]
Net interest income (expense)	578	678	701
Net intersegment interest income (expense)	(146)	(126)	(139)
Segment net interest income	432	552	562
Allocated provision for loan and lease losses	39	85	135
Noninterest income	232	222	216
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	219	255	258
Amortization of intangibles	5	5	5
Allocated corporate expenses	59	65	78
Income before income taxes	342	364	302
Provision (benefit) for income taxes	88	94	65
Net Income	254	270	237
Identifiable assets (period end)	18,218	16,564	17,003
Insurance Services [Member]
Net interest income (expense)	2	3	3
Net intersegment interest income (expense)	6	6	4
Segment net interest income	8	9	7
Allocated provision for loan and lease losses	0	0	0
Noninterest income	1,663	1,535	1,365
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	1,189	1,135	1,016
Amortization of intangibles	53	61	61
Allocated corporate expenses	86	64	82
Income before income taxes	343	284	213
Provision (benefit) for income taxes	110	97	70
Net Income	233	187	143
Identifiable assets (period end)	2,978	2,990	3,297
Financial Services [Member]
Net interest income (expense)	183	166	132
Net intersegment interest income (expense)	263	282	303
Segment net interest income	446	448	435
Allocated provision for loan and lease losses	25	18	11
Noninterest income	770	744	724
Intersegment net referral fees (expense)	24	28	33
Noninterest expense	644	616	641
Amortization of intangibles	2	3	3
Allocated corporate expenses	119	98	91
Income before income taxes	450	485	446
Provision (benefit) for income taxes	170	182	169
Net Income	280	303	277
Identifiable assets (period end)	12,849	10,001	8,929
Other Treasury And Corporate [Member]
Net interest income (expense)	568	639	945
Net intersegment interest income (expense)	(167)	(341)	(494)
Segment net interest income	401	298	451
Allocated provision for loan and lease losses	(66)	(16)	(13)
Noninterest income	(440)	(281)	(417)
Intersegment net referral fees (expense)	(144)	(205)	(223)
Noninterest expense	1,623	1,555	1,471
Amortization of intangibles	2	1	3
Allocated corporate expenses	(1,515)	(1,365)	(1,370)
Income before income taxes	(227)	(363)	(280)
Provision (benefit) for income taxes	(376)	146	(325)
Net Income	149	(509)	45
Identifiable assets (period end)	49,989	50,181	50,856
Total Bbt Corporation [Member]
Net interest income (expense)	5,374	5,616	5,857
Net intersegment interest income (expense)	0	0	0
Segment net interest income	5,374	5,616	5,857
Allocated provision for loan and lease losses	251	592	1,057
Noninterest income	3,784	3,937	3,820
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	5,830	5,731	5,718
Amortization of intangibles	91	106	110
Allocated corporate expenses	0	0	0
Income before income taxes	2,986	3,124	2,792
Provision (benefit) for income taxes	760	1,395	764
Net Income	2,226	1,729	2,028
Identifiable assets (period end)	$ 186,814	$ 183,010	$ 184,499