Bank of America Corporation Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Principles (Details)	3 Months Ended
Summary of Significant Accounting Principles (Details)	Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue, performance obligation period	1 year
Contract cancellation period	1 year
Card Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue, performance obligation period	12 months
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Fee percentage of assets under management	0.50%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Fee percentage of assets under management	1.50%