Summary of Significant Accounting Principles - Revenue Recognition (Details)	12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]
Period uncollected fees are written off for credit receivables	180 days
Period uncollected fees are written off	60 days

Threshold Period for Uncollected Fees for Service Charges on Card Receivables

No definition available.

Name:	bac_ThresholdPeriodforUncollectedFeesforServiceChargesonCardReceivables
Namespace Prefix:	bac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration