Shareholders' Equity (Narrative) (Details) In Millions, unless otherwise specified	Dec. 31, 2014
Schedule Of Shareholders Equity [Line Items]
Common stock, remaining shares authorized for repurchase	44

Common stock remaining shares authorized for repurchase

No definition available.

Name:	bbt_CommonStockRemainingSharesAuthorizedForRepurchase
Namespace Prefix:	bbt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant