XBRL US developed the US GAAP digital dictionary of required disclosures and common reporting practices under contract with the Securities and Exchange Commission (SEC) and produced the 2008 and 2009 releases of the taxonomy.  In April 2010, the Financial Accounting Foundation (FAF) took on the role of ongoing support and maintenance.  XBRL US works closely with the FAF to support these efforts.  The SEC mandated the use of XBRL for public company reporting and other reporting applications:

1. Public Company Reporting – all public companies must file in XBRL format; companies with worldwide public float greater than $5 billion to comply starting with period ending June 2009; all other large accelerated filers to comply starting with period ending June 2010; all other public companies comply with period ending June 2011.
   
    
2. Risk Return Summary Portion of Mutual Fund Prospectus – mutual funds must begin publishing the risk return summary portion of their prospectuses in XBRL format starting January 1, 2011.
   
    
3. Credit Rating Agencies – must report ratings actions (initial rating, upgrades, downgrades, etc.) in XBRL format. 

The SEC and XBRL US have resources available to help public company preparers get educated, identify tools and resources to tag their financials and create their own XBRL-formatted financials.