Annual Fund Operating Expenses (dei_DocumentInformationDocumentAxis, (Oppenheimer Equity Fund, Inc.))	0 Months Ended
	Mar. 29, 2012
Class A
Operating Expenses:
Management Fees	0.55%
Distribution and/or Service (12b-1) Fees	0.19%
Other Expenses	0.21%
Total Annual Fund Operating Expenses	0.95%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.95%
Class B
Operating Expenses:
Management Fees	0.55%
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses	0.58%
Total Annual Fund Operating Expenses	2.13%
Fee Waiver and Expense Reimbursement	(0.17%)	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.96%
Class C
Operating Expenses:
Management Fees	0.55%
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses	0.35%
Total Annual Fund Operating Expenses	1.90%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.90%
Class N
Operating Expenses:
Management Fees	0.55%
Distribution and/or Service (12b-1) Fees	0.50%
Other Expenses	0.36%
Total Annual Fund Operating Expenses	1.41%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	1.41%
Class Y
Operating Expenses:
Management Fees	0.55%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	0.26%
Total Annual Fund Operating Expenses	0.81%
Fee Waiver and Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement	0.81%

[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year, and to 0.30% of average annual net assets per fiscal year for Class A. These limitations may not be amended or withdrawn until one year after the date of this prospectus.