Expense Example - AB EQUITY INCOME FUND INC	Feb. 26, 2021 USD ($)
Class A
Expense Example:
Expense Example, with Redemption, 1 Year	$ 523
Expense Example, with Redemption, 3 Years	730
Expense Example, with Redemption, 5 Years	954
Expense Example, with Redemption, 10 Years	1,598
Class C
Expense Example:
Expense Example, with Redemption, 1 Year	278	[1]
Expense Example, with Redemption, 3 Years	551
Expense Example, with Redemption, 5 Years	949
Expense Example, with Redemption, 10 Years	2,062
Advisor Class
Expense Example:
Expense Example, with Redemption, 1 Year	77
Expense Example, with Redemption, 3 Years	240
Expense Example, with Redemption, 5 Years	417
Expense Example, with Redemption, 10 Years	930
Class R
Expense Example:
Expense Example, with Redemption, 1 Year	145
Expense Example, with Redemption, 3 Years	449
Expense Example, with Redemption, 5 Years	776
Expense Example, with Redemption, 10 Years	1,702
Class K
Expense Example:
Expense Example, with Redemption, 1 Year	113
Expense Example, with Redemption, 3 Years	353
Expense Example, with Redemption, 5 Years	612
Expense Example, with Redemption, 10 Years	1,352
Class I
Expense Example:
Expense Example, with Redemption, 1 Year	81
Expense Example, with Redemption, 3 Years	252
Expense Example, with Redemption, 5 Years	439
Expense Example, with Redemption, 10 Years	978
Class Z
Expense Example:
Expense Example, with Redemption, 1 Year	70
Expense Example, with Redemption, 3 Years	221
Expense Example, with Redemption, 5 Years	384
Expense Example, with Redemption, 10 Years	$ 859

[1] If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.