Annual Fund Operating Expenses (dei_DocumentInformationDocumentAxis, (Oppenheimer Equity Income Fund Inc.))	0 Months Ended
	Feb. 28, 2012
Class A
Operating Expenses:
Management Fees	0.62%
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.22%
Total Annual Fund Operating Expenses	1.09%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.09%
Class B
Operating Expenses:
Management Fees	0.62%
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses	0.44%
Total Annual Fund Operating Expenses	2.06%
Fee Waiver and Expense Reimbursement	(0.04%)	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	2.02%
Class C
Operating Expenses:
Management Fees	0.62%
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses	0.24%
Total Annual Fund Operating Expenses	1.86%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.86%
Class I
Operating Expenses:
Management Fees	0.62%	[2]
Distribution and/or Service (12b-1) Fees	none	[2]
Other Expenses	0.05%	[2]
Total Annual Fund Operating Expenses	0.67%	[2]
Fee Waiver and Expense Reimbursement	none	[1],[2]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.67%	[2]
Class N
Operating Expenses:
Management Fees	0.62%
Distribution and/or Service (12b-1) Fees	0.50%
Other Expenses	0.43%
Total Annual Fund Operating Expenses	1.55%
Fee Waiver and Expense Reimbursement	(0.05%)	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.50%
Class Y
Operating Expenses:
Management Fees	0.62%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	0.18%
Total Annual Fund Operating Expenses	0.80%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.80%

[1] The Fund's transfer agent has voluntarily agreed to limit its fees for Classes B, C, N and Y to 0.35% of average annual net assets per class per fiscal year, and to 0.30% of average annual net assets per fiscal year for Class A. This limitation may not be amended or withdrawn until one year after the date of this prospectus.

[2] Estimated expenses for the first full year that Class I shares are offered. Class I shares will first be offered on the date of this prospectus.