010002 - Document - Oppenheimer Rochester Short Term Municipal Fund {Unlabeled} link:presentationLink link:calculationLink link:definitionLink 020062 - Schedule - Average Annual Total Returns {Transposed} link:presentationLink link:calculationLink link:definitionLink 020032 - Schedule - Expense Example {Transposed} link:presentationLink link:calculationLink link:definitionLink 020022 - Schedule - Annual Fund Operating Expenses link:presentationLink link:calculationLink link:definitionLink 020012 - Schedule - Shareholder Fees link:presentationLink link:calculationLink link:definitionLink 020042 - Schedule - Expense Example, No Redemption {Transposed} link:presentationLink link:calculationLink link:definitionLink 020052 - Schedule - Annual Total Returns {Transposed} link:presentationLink link:calculationLink link:definitionLink