Annual Fund Operating Expenses (dei_DocumentInformationDocumentAxis, (Oppenheimer Capital Appreciation Fund))	0 Months Ended
	Dec. 28, 2012
Class A
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	0.23%
Other Expenses	0.31%
Total Annual Fund Operating Expenses	1.13%
Fee Waiver and/or Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.13%
Class B
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	0.99%
Other Expenses	0.59%
Total Annual Fund Operating Expenses	2.17%
Fee Waiver and/or Expense Reimbursement	(0.20%)	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.97%
Class C
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	1.00%
Other Expenses	0.34%
Total Annual Fund Operating Expenses	1.93%
Fee Waiver and/or Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.93%
Class I
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	0.03%
Total Annual Fund Operating Expenses	0.62%
Fee Waiver and/or Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	0.62%
Class N
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	0.49%
Other Expenses	0.31%
Total Annual Fund Operating Expenses	1.39%
Fee Waiver and/or Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	1.39%
Class Y
Operating Expenses:
Management Fees	0.59%
Distribution and/or Service (12b-1) Fees	none
Other Expenses	0.13%
Total Annual Fund Operating Expenses	0.72%
Fee Waiver and/or Expense Reimbursement	none	[1]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	0.72%

[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average annual net assets per fiscal year for Class A. This fee waiver and/or expense limitation may not be amended or withdrawn until one year from the date of this prospectus.