Income Taxes (Schedule of Temporary Tax Differences That Gave Rise to Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets
ALLL	$ 556	$ 655
Postretirement plans	372	180
Net unrealized loss on AFS securities	36	172
Equity-based compensation	137	152
Reserves and expense accruals	247bbt_ReservesAndExpenseAccruals	181bbt_ReservesAndExpenseAccruals
Other	242	189
Total deferred tax assets	1,590	1,529
Deferred tax liabilities
Prepaid pension plan expense	477	431
MSRs	312	380
Lease financing	375	315
Loan fees & expenses	265	263
Identifiable intangible assets	139	128
Derivatives & hedging	122	45
Other	93us-gaap_DeferredTaxLiabilitiesOther	120us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	1,783us-gaap_DeferredTaxLiabilities	1,682us-gaap_DeferredTaxLiabilities
Net deferred tax asset (liability)	$ (193)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (153)us-gaap_DeferredTaxAssetsLiabilitiesNet

The amount as of the balance sheet date of the estimated future tax effects arising from loan fees or expense that are included in accounting income in conformity with generally accepted accounting principles but excluded from tax-basis income, which will increase or decrease future taxable income when such income or expense is recognized for tax purposes.

No definition available.