The IFRS Taxonomy is designed so that the majority of elements have a positive value. This rule tests whether the values for a given list of elements are negative. The rule does not test elements when a specified member is present which would allow the value to be negative.
See file DQC_0080_ListOfElements.xlsx which provides a list of elements that should not be negative. The rule tests whether these elements have a negative value in an XBRL document.
See file DQC_0080_MemberExclusions.xlsx for a list of members that, when used with these elements, allow the value of the element to be negative. The rule does not test these member/element combinations.
The IFRS taxonomy is designed for the majority of elements to have a positive value, so that the value reported in the XBRL document represents the correct balance type for the element (e.g., debit balance type for assets and expenses and losses or credit balance type for liabilities and income and gains). If the value reported in the HTML document is shown with parentheses, the value reported in the XBRL document should still be positive, other than as described in the following sentence. In some limited cases, if the value also has a specified member associated with it, the value may be negative (e.g., when an element is used for an adjustment or elimination, the value may need to be negative).
If the value reported in the HTML document is shown in parentheses (e.g., interest expense or loss on disposition of assets), you may use a negated label to present the value in parenthesis in the SEC Interactive Data viewer without changing the positive value reported in the XBRL document. The value reported in the XBRL document (e.g., interest expense or loss on disposition of assets) should be the same as the value reported in the HTML document, even though the value in the HTML document is shown in parenthesis. Therefore, it is an error to change the value reported in the XBRL document to a negative solely because the value reported in the HTML document is shown in parenthesis.
Filers continue to have incorrect negative amounts in files, which is inconsistent with the balance types and definitions of the elements used and the structure of the IFRS Taxonomy. Incorrect values in a filing makes it difficult or impossible to use that data for automated analysis.
Let non-negative concepts be the set concepts defined in columns J and K of DQC_0080_ListOfElements.xlsx.
Let sub-string exclusions be the set of strings defined in column J of DQC_0080_MemberExclusions.xlsx where the value of column G is "Member element name contains the text (Case insensitive)".
Let excluded axes be the set of axes defined in column J of DQC_0080_MemberExclusions.xlsx where the value of column G is "Axis equals" and column K is empty.
Let excluded axis/member pairs be the set of axis/member pairs, defined in columns J, M and N of DQC_0080_MemberExclusions.xlsx where the value of column G is "Axis equals" and column K is "AND member equals".
If a fact in the report has a concept in non-negative concepts then its value MUST NOT be negative unless:
- the fact has a dimension with a non-default value that is in the set of excluded axis/member pairs; or
- the fact has a dimension and member that is in the set of excluded axes; or
- any string in sub-string exclusions is a case-insensitive substring of the local name of any non-default dimension member applied to the fact.
Example rule message1
An example of the general rule message is shown below.
Accruals has a value of -400,000 which is less than zero. This element should not have a negative value.
The properties of this ifrs:Accruals fact are:
Period: 2012-12-31
Dimensions: none
Unit: USD
Rule version: 16.0
${fact1.label} has a value of ${fact1.value} which is less than zero. This element should not have a negative value.
The properties of this ${fact1.name} fact are:
Period: ${fact1.period}
Dimensions: ${fact1.dimensions}
Unit: ${fact1.unit}
Rule version: ${ruleVersion}
The rule element id is used to identify unique elements or combinations of elements tested in the rule.
See DQC_0080_ListOfElements.xlsx and DQC_0080_MemberExclusions.xlsx spreadsheets for rule element ids.
1: Presentation style of rule messages may differ among software implementations of the rules.
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