Derivative Financial Instruments - Dealer Counterparties and Central Clearing Parties (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Dealer Counterparties
Credit Derivatives [Line Items]
Cash collateral received from dealer counterparties	$ 396	$ 283
Derivatives in a net gain position secured by that collateral	408	301
Unsecured positions in a net gain with dealer counterparties after collateral postings	13	18
Cash collateral, including initial margin, posted	179	156
Derivatives in a net loss position secured by that collateral	184	161
Additional collateral that would have been posted had BB&T's credit ratings dropped below investment grade	5	6
Central Clearing Parties
Credit Derivatives [Line Items]
Cash collateral, including initial margin, posted	370	223
Derivatives in a net loss position secured by that collateral	394	227
Securities pledged to central clearing parties	$ 190	$ 207