Bank of America Corporation Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock Narrative (Details)

Shareholders' Equity - Common Stock Narrative (Details) - USD ($)							3 Months Ended		12 Months Ended
	Jan. 31, 2018	Oct. 25, 2017	Aug. 24, 2017	Jul. 26, 2017	Apr. 26, 2017	Jan. 26, 2017	Mar. 31, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 05, 2017	Jun. 28, 2017	Jan. 13, 2017
Common Stock
Stock repurchase program, authorized amount												$ 5,000,000,000.0
Common stock dividends declared (in dollars per share)		$ 0.12		$ 0.12	$ 0.075	$ 0.075			$ 0.39000000
Common stock repurchased									$ 12,814,000,000	$ 5,112,000,000	$ 2,374,000,000
Share-based compensation, number of shares authorized (in shares)									869,000,000
Subsequent Event
Common Stock
Common stock dividends declared (in dollars per share)	$ 0.120						$ 0.12
Series T Preferred Stock
Common Stock
Per annum dividend rate			6.00%						6.00%
Carrying amount of stock			$ 2,900,000,000
Common Stock
Common Stock
Common stock repurchased									$ 12,814,000,000	5,112,000,000	2,374,000,000
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)			700,000,000					700,000,000
Stock issued (in shares)									66,000,000
Shares paid for tax withholding for share based compensation (in shares)									27,000,000
Warrants Expiring October 18, 2018
Common Stock
Warrants outstanding (in shares)									122,000,000
Minimum required dividend rate (in dollars per share)									$ 0.32
Exercise price per warrant (in dollars per share)									$ 30.79
Warrants Expiring January 16, 2019
Common Stock
Warrants outstanding (in shares)									143,000,000
Minimum required dividend rate (in dollars per share)									$ 0.01
Exercise price per warrant (in dollars per share)									$ 12.757
2017 CCAR
Common Stock
Stock repurchase program, authorized amount													$ 12,000,000,000
2017 CCAR, Equity-Based Compensation Plan Effect Offset
Common Stock
Stock repurchase program, authorized amount													$ 900,000,000
CCAR capital plan repurchases \| Common Stock
Common Stock
Common stock repurchased									$ 9,347,000,000	4,312,000,000	2,374,000,000
Other authorized repurchases \| Common Stock
Common Stock
Stock repurchase program, authorized amount												$ 1,700,000,000.0		$ 1,800,000,000.0
Common stock repurchased									$ 3,467,000,000	$ 800,000,000	$ 0