Regulatory Requirements and Other Restrictions (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Regulatory Requirements and Other Restrictions
Net reserve requirement	$ 272bbt_NetReserveRequirement

Amount an institution is required to maintain in the form of vault cash or deposits with the Federal Reserve Bank based on specified percentages of certain deposit types, subject to various adjustments

No definition available.

Name:	bbt_NetReserveRequirement
Namespace Prefix:	bbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration