Operating Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net interest income (expense)	$ 5,592	$ 5,374	$ 5,616
Allocated provision for loan and lease losses	428	251	592
Noninterest income	4,019	3,856	4,036
Noninterest expense	6,266	5,852	5,777
Amortization of intangibles	105	91	106
Income before income taxes	2,917	3,127	3,283
Provision (benefit) for income taxes	794	921	1,553
Net income	2,123	2,206	1,730
Identifiable segment assets (period end)	209,947	186,834
Community Banking-After Realignment [Member]
Net interest income (expense)	1,801	1,726	1,712
Net intersegment interest income (expense)	1,272	1,188	1,336
Segment net interest income	3,073	2,914	3,048
Allocated provision for loan and lease losses	67	123	279
Noninterest income	1,166	1,184	1,180
Intersegment net referral fees (expense)	135	120	178
Noninterest expense	1,517	1,428	1,573
Amortization of intangibles	23	29	36
Allocated corporate expenses	1,225	1,204	1,123
Income before income taxes	1,542	1,434	1,395
Provision (benefit) for income taxes	564	524	511
Net income	978	910	884
Identifiable segment assets (period end)	68,245	55,495	55,667
Residential Mortgage Banking-After Realignment [Member]
Net interest income (expense)	1,357	1,482	1,584
Net intersegment interest income (expense)	(905)	(984)	(999)
Segment net interest income	452	498	585
Allocated provision for loan and lease losses	9	(107)	12
Noninterest income	355	310	481
Intersegment net referral fees (expense)	2	2	2
Noninterest expense	321	498	357
Amortization of intangibles	0	0	0
Allocated corporate expenses	93	91	81
Income before income taxes	386	328	618
Provision (benefit) for income taxes	146	124	235
Net income	240	204	383
Identifiable segment assets (period end)	33,407	34,463	36,083
Dealer Financial Services-After Realignment [Member]
Net interest income (expense)	881	835	834
Net intersegment interest income (expense)	(153)	(160)	(158)
Segment net interest income	728	675	676
Allocated provision for loan and lease losses	254	237	214
Noninterest income	7	2	5
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	151	114	106
Amortization of intangibles	0	0	0
Allocated corporate expenses	39	31	31
Income before income taxes	291	295	330
Provision (benefit) for income taxes	111	112	126
Net income	180	183	204
Identifiable segment assets (period end)	15,130	12,821	11,525
Specialized Lending-After Realignment [Member]
Net interest income (expense)	648	575	676
Net intersegment interest income (expense)	(236)	(205)	(140)
Segment net interest income	412	370	536
Allocated provision for loan and lease losses	43	36	83
Noninterest income	260	222	222
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	254	210	243
Amortization of intangibles	4	5	5
Allocated corporate expenses	63	62	69
Income before income taxes	308	279	358
Provision (benefit) for income taxes	74	64	92
Net income	234	215	266
Identifiable segment assets (period end)	18,222	15,641	15,993
Insurance Services-After Realignment [Member]
Net interest income (expense)	2	2	3
Net intersegment interest income (expense)	7	6	6
Segment net interest income	9	8	9
Allocated provision for loan and lease losses	0	0	0
Noninterest income	1,608	1,663	1,535
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	1,191	1,189	1,135
Amortization of intangibles	47	53	61
Allocated corporate expenses	99	86	64
Income before income taxes	280	343	284
Provision (benefit) for income taxes	98	110	97
Net income	182	233	187
Identifiable segment assets (period end)	2,804	2,965	2,990
Financial Services-After Realignment [Member]
Net interest income (expense)	217	187	169
Net intersegment interest income (expense)	312	262	295
Segment net interest income	529	449	464
Allocated provision for loan and lease losses	65	26	20
Noninterest income	847	779	757
Intersegment net referral fees (expense)	22	15	16
Noninterest expense	682	635	606
Amortization of intangibles	3	2	3
Allocated corporate expenses	136	127	109
Income before income taxes	512	453	499
Provision (benefit) for income taxes	193	170	187
Net income	319	283	312
Identifiable segment assets (period end)	16,429	12,887	10,572
Other, Treasury and Corporate-After Realignment [Member]
Net interest income (expense)	686	567	638
Net intersegment interest income (expense)	(297)	(107)	(340)
Segment net interest income	389	460	298
Allocated provision for loan and lease losses	(10)	(64)	(16)
Noninterest income	(224)	(304)	(144)
Intersegment net referral fees (expense)	(159)	(137)	(196)
Noninterest expense	2,045	1,687	1,651
Amortization of intangibles	28	2	1
Allocated corporate expenses	(1,655)	(1,601)	(1,477)
Income before income taxes	(402)	(5)	(201)
Provision (benefit) for income taxes	(392)	(183)	305
Net income	(10)	178	(506)
Identifiable segment assets (period end)	55,710	52,562	50,213
Total Bbt Corporation After Realignment [Member]
Net interest income (expense)	5,592	5,374	5,616
Net intersegment interest income (expense)	0	0	0
Segment net interest income	5,592	5,374	5,616
Allocated provision for loan and lease losses	428	251	592
Noninterest income	4,019	3,856	4,036
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	6,161	5,761	5,671
Amortization of intangibles	105	91	106
Allocated corporate expenses	0	0	0
Income before income taxes	2,917	3,127	3,283
Provision (benefit) for income taxes	794	921	1,553
Net income	2,123	2,206	1,730
Identifiable segment assets (period end)	209,947	186,834	183,043
Community Banking [Member]
Net interest income (expense)	1,801	1,726	1,712
Net intersegment interest income (expense)	1,272	1,188	1,336
Segment net interest income	3,073	2,914	3,048
Allocated provision for loan and lease losses	67	123	279
Noninterest income	1,166	1,184	1,180
Intersegment net referral fees (expense)	135	120	178
Noninterest expense	1,517	1,428	1,573
Amortization of intangibles	23	29	36
Allocated corporate expenses	1,225	1,204	1,123
Income before income taxes	1,542	1,434	1,395
Provision (benefit) for income taxes	564	524	511
Net income	978	910	884
Identifiable segment assets (period end)	68,245	55,495	55,667
Residential Mortgage Banking [Member]
Net interest income (expense)	1,357	1,482	1,584
Net intersegment interest income (expense)	(905)	(984)	(999)
Segment net interest income	452	498	585
Allocated provision for loan and lease losses	9	(107)	12
Noninterest income	355	310	481
Intersegment net referral fees (expense)	2	2	2
Noninterest expense	314	498	357
Amortization of intangibles	0	0	0
Allocated corporate expenses	93	91	81
Income before income taxes	393	328	618
Provision (benefit) for income taxes	149	124	235
Net income	244	204	383
Identifiable segment assets (period end)	33,407	34,463	36,083
Dealer Financial Services [Member]
Net interest income (expense)	881	835	834
Net intersegment interest income (expense)	(153)	(160)	(158)
Segment net interest income	728	675	676
Allocated provision for loan and lease losses	254	237	214
Noninterest income	7	2	5
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	151	114	106
Amortization of intangibles	0	0	0
Allocated corporate expenses	39	31	31
Income before income taxes	291	295	330
Provision (benefit) for income taxes	111	112	126
Net income	180	183	204
Identifiable segment assets (period end)	15,130	12,821	11,525
Specialized Lending [Member]
Net interest income (expense)	651	578	678
Net intersegment interest income (expense)	(186)	(146)	(126)
Segment net interest income	465	432	552
Allocated provision for loan and lease losses	48	39	85
Noninterest income	271	232	222
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	256	211	245
Amortization of intangibles	5	5	5
Allocated corporate expenses	64	63	70
Income before income taxes	363	346	369
Provision (benefit) for income taxes	95	89	96
Net income	268	257	273
Identifiable segment assets (period end)	20,732	18,218	16,564
Insurance Services [Member]
Net interest income (expense)	2	2	3
Net intersegment interest income (expense)	7	6	6
Segment net interest income	9	8	9
Allocated provision for loan and lease losses	0	0	0
Noninterest income	1,608	1,663	1,535
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	1,191	1,189	1,135
Amortization of intangibles	47	53	61
Allocated corporate expenses	99	86	64
Income before income taxes	280	343	284
Provision (benefit) for income taxes	98	110	97
Net income	182	233	187
Identifiable segment assets (period end)	2,804	2,965	2,990
Financial Services [Member]
Net interest income (expense)	213	183	166
Net intersegment interest income (expense)	313	263	282
Segment net interest income	526	446	448
Allocated provision for loan and lease losses	65	25	18
Noninterest income	847	779	757
Intersegment net referral fees (expense)	22	15	16
Noninterest expense	680	634	604
Amortization of intangibles	3	2	3
Allocated corporate expenses	135	127	108
Income before income taxes	512	452	488
Provision (benefit) for income taxes	193	170	183
Net income	319	282	305
Identifiable segment assets (period end)	16,374	12,849	10,001
Other Treasury And Bbt Corporate [Member]
Net interest income (expense)	687	568	639
Net intersegment interest income (expense)	(348)	(167)	(341)
Segment net interest income	339	401	298
Allocated provision for loan and lease losses	(15)	(66)	(16)
Noninterest income	(235)	(314)	(144)
Intersegment net referral fees (expense)	(159)	(137)	(196)
Noninterest expense	2,052	1,687	1,651
Amortization of intangibles	27	2	1
Allocated corporate expenses	(1,655)	(1,602)	(1,477)
Income before income taxes	(464)	(71)	(201)
Provision (benefit) for income taxes	(416)	(208)	305
Net income	(48)	137	(506)
Identifiable segment assets (period end)	53,255	50,023	50,213
Total Bbt Corporation [Member]
Net interest income (expense)	5,592	5,374	5,616
Net intersegment interest income (expense)	0	0	0
Segment net interest income	5,592	5,374	5,616
Allocated provision for loan and lease losses	428	251	592
Noninterest income	4,019	3,856	4,036
Intersegment net referral fees (expense)	0	0	0
Noninterest expense	6,161	5,761	5,671
Amortization of intangibles	105	91	106
Allocated corporate expenses	0	0	0
Income before income taxes	2,917	3,127	3,283
Provision (benefit) for income taxes	794	921	1,553
Net income	2,123	2,206	1,730
Identifiable segment assets (period end)	$ 209,947	$ 186,834	$ 183,043