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Decimal Item Type

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We implemented the TIG for fair value, as part of the 2018 taxonomy migration. I use the All Facts checklist and running into exceptions for the step “Check “number” or “ratio” (e.g., xbrli:pure) unit is only applied to “percentItemType” or “pureItemType” concepts. Any exceptions will require a different standard or custom unit.” I have number unit for a decimalitemtype.

In the TIG for fair value, valuation technique, the measurement input tags have a decimalItemType. If I have a discount rate, does it mean my unit should be percent? If I have a EBITDA, would it be price?

Also, what’s the difference between a Pure Type vs Pure Unit? A pure Type can have a number or ratio unit (per the all facts checklist). So what’s the definition of a pure unit? Can I just have pure unit for all these measurement input tags?

Any links or reading resources are also helpful! Thank you Community :) 

 

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  • Mike

    Great questions as always, Daisy! We're looking into them and will get back to you ASAP. Thanks much and happy Friday in the meantime. Cheers!

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  • Mike

    Hello again!

    I did get some follow-up from team. Here goes.

    Each element in the US GAAP taxonomy has an itemType assigned to it. The itemType's have an allowable set units that can be applied as attribute to a fact. A list of these units can be found  here on the Unit Type Registry. A pure unit is an allowable unit for an element with a pureItemType. Furthermore, the pure unit can be used for dimensionless numeric items like percentages or rates.

    The measurement input elements were created with a decimalitemType to allow for flexibility in units. As the taxonomy implementation guide highlights, if a percentage value is disclosed, the "pure" unit (or identified as "number" within Wdesk) would be utilized on that fact. Additionally, if US dollars per share value is disclosed the "usd_per_share" unit would be utilized on that fact.

    Hope this helps. As always, holler if you have any questions. Thanks, and have an awesome day!

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