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FAST Act issued by the SEC requires iXBRL filers to tag all data on the cover pages for forms 8-K, 10-Q, 10-K, and 20-F and 40-F annual reports.
For details about when you are required to follow these guidelines, take a look at FAST Act and iXBRL Guidance for Filers.
Cover page XBRL requirements
The cover page tagging requirements vary by forms and concepts. Some concept requirements may have dependencies on other concepts.
Click the form types below to see cover page tagging requirements, updated for 2020 DEI.
10-K, 10-KT, 10-Q, 10-QT, 8-K
For guidance around exhibit updates, see the Compliance and Disclosure Interpretations - 101.01 & 101.04 provided by the SEC.
XBRL date for 8-Ks
All 8-K filings must use the 1 day duration XBRL date as the date of the report for all cover page and DEI elements, not the Qn YTD date.
Tag checkboxes vs. words
Do I tag the words or the box?
There are many facts on a cover page that have checkboxes and checkboxes with words. Here are some additional details to help you understand when you tag the checkbox or the word.
Many of the tags are transformation tags, which means the fact is transformed into the appropriate value for the XBRL. For example, when you tag a checkbox for a True/False (Boolean Item Type) fact, the source value transforms it to either true or false.
For more information about transformations, see section 18.104.22.168 Inline XBRL Transformation Registries supported by EDGAR in the EDGAR Filer Manual.
Facts with multiple checkboxes
Tag the words for facts with multiple checkboxes, such as Entity Filer Category and Document Accounting Standard.
For example, when you check the Large accelerated filer box, you tag the words Large accelerated filer.
Tag the word for facts where the fact value is either Yes or No.
For example, when you have a checked Yes box for Entity Current Reporting Status, you tag the word Yes.
True/false facts (boolean boxes)
For True/False facts that use boolean ballot boxes (Boolean Item Type), tag the Yes box only. These are facts where the true/false value is indicated by either a checked box (true) or a blank box (false), but the text, true or false, does not appear on the cover page.
For example, when you have a checked Yes box for Entity Shell Company, you tag the box.
You need to replace boolean ballot boxes — the blank box, checked box, and box with an X with the appropirate Arial MS Unicode symbol.
Standard root abstract
A standard root abstract called Cover page is available in the 2019 DEI and 2020 DEI taxonomies. We recommend updating extended root abstracts to the new standard element.
Check the taxonomy
As you prepare to tag all values on a cover page with XBRL, you'll need to check which taxonomy the document uses. A warning icon indicates the document is using an older taxonomy and that there is a new taxonomy available. You'll want to use the most recent taxonomy, including either the 2019 or 2020 DEI taxonomies, to make sure your document's XBRL meets SEC guidance.
For example, if you are using US GAAP 2019 (DEI 2018), you will need to migrate to a US GAAP 2019 or US GAAP 2020 taxonomy using DEI 2019 or DEI 2020.
The primary difference between the 2019 DEI and 2020 DEI taxonomies is that the 2020 DEI taxonomy contains a new element required for annual forms only.
Follow the instructions in Taxonomy Migration if you need to move your document to another taxonomy.
If you are looking for additional guidance, take a look at these other resources: