XBRL quality matters, and the XBRL US Data Quality Committee (DQC) is committed to improving quality of interactive data filings submitted to the SEC by providing guidance and rules that will detect and prevent inconsistencies in XBRL data.
On June 30th, 2016, the DQC announced the start of its second public exposure period for proposed rules and guidance. The recently proposed rules consist of the following:
Axis with Inappropriate Members - Certain axes in the US GAAP taxonomy should only have certain members as shown in the US GAAP taxonomy. This rule tests whether these axes have inappropriate members.
Negative Values with Dependence - The US GAAP Taxonomy is designed so that the majority of elements have a positive value. This rule tests that the values for a given list of elements are negative when a precondition is met for another element.
Negative Values with No Dimensions - The US GAAP Taxonomy is designed so that the majority of elements have a positive value. This rule tests that the values for a given list of elements with no dimensions are negative. If the value has a dimension member, then the rule will not fire.
Negative Values: Additions to Existing Rule – Additional elements added.
Deprecated Element is used in the Filing - This rule evaluates if the company has used a deprecated element in the filing. The rule specifically checks if a deprecated element is included in the presentation relationship defined in the company’s extension taxonomy. Deprecated elements are determined by taking all children of the “DeprecatedItems” element defined in the presentation tree of the US GAAP taxonomy. Errors are reported for each deprecated element, including errors for each line item with an associated deprecated member or axis.
Axis with a Default Member that Differs from the US GAAP Taxonomy - This rule evaluates whether the dimension default is associated with a given axis in the company’s extension taxonomy. Companies should not change the default member defined in the US GAAP Taxonomy for a given axis in their extension taxonomy.
Guidance on Tagging Axis and Members Using the US GAAP Taxonomy - Certain axes in the US GAAP taxonomy should only have certain members, otherwise consumption of the data is adversely impacted because the resulting axis and member combinations are nonsensical, e.g., reporting a type of currency as a member on a debt instrument axis. The following guidance provides limitations on the use of certain axis and member combinations that should be adhered to when tagging financial information using the US GAAP Taxonomy.
These rules and further documentation can be found at https://xbrl.us/data-quality/public-review/. We encourage Certent customers and other SEC filers to review the proposed rules and provide comments or concerns. The proposed rules are available for public exposure until August 31st, 2016.