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XBRL in the UK Peter Calvert. XBRL European Technical Meeting 5 October 2006. Overview. Projects in the UK Companies House - regulator which receives company accounts Tax authority - HMRC XBRL to be mandatory in UK for all company account and tax reporting after March 2010.
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XBRL in the UKPeter Calvert XBRL European Technical Meeting 5 October 2006
Overview • Projects in the UK • Companies House - regulator which receives company accounts • Tax authority - HMRC • XBRL to be mandatory in UK for all company account and tax reporting after March 2010
Types of UK Reporting • UK GAAP • Some 2.3 million unlisted companies • IFRS • about 2,500 listed companies • HMRC Tax Computations • Other additional reporting -e.g. FSA
Nature of UK reporting • No fixed format or content • Accounts of most companies vary considerably in content and layout • Only some of the smallest companies follow a fairly predictable format • However, this is still a large number of companies
Consequences • Large and complex GAAP taxonomy • Need to support company extensions • Need to support varying formats => requirements for rendering • Various issues arise with calculations, handling of text etc.
Plans in the UK • Start with small companies, then move to more complex cases. • Companies House project for XBRL filing by audit exempt companies • HMRC tax computations and accounts for audit exempt companies • Expand to larger companies
Taxonomy development • Full UK GAAP taxonomy • Extend for small companies • HMRC tax computations taxonomy • (Use stylesheets for rendering) • Revise full UK GAAP taxonomy • Issue to software vendors for feedback and implementation
Companies House small company project • Went live in December 2005 • Filing by accounting software packages and by web interface • About 40,000 accounts filed so far • Significant increase in quality and saving of resources
uk-gcd Taxonomy Schema Document Label Linkbase XBRL Instance Document uk-gaap-ae Companies House Taxonomy Schema Document (approx. 60 elements) uk-gaap-pt Taxonomy Schema Document (over 3,000 elements) Label Linkbase Reference Linkbase Linkbases Companies House implementation
HMRC, Next Steps and UK GAAP • HMRC filing of tax computations just gone live • Revision of small companies extension => broader range of smaller company filing in early 2007 • Revision of UK GAAP taxonomy now in final stages
Revision of UK GAAP taxonomy and expansion of XBRL filing • Revised version incorporates dimensions (and new GCD) • Now under internal review • Release to accounting software companies in November • Important implementation stage: challenge for companies and XBRL
Issues - Dimensions • Important addition - much more effective representation of data • Reduction in number of elements • BUT complex to implement • Statistics: 34 dimensions, 22 hypercubes • Use of inheritance to simplify extension • Feedback from review and early implementation
Issues - Rendering • Standard mechanism to make instances readable by humans • Required by data providers for efficient instance creation and assurance • Needed by regulators for efficient consumption and publication of data
Other Issues (1) • Text: what text to represent and at what level of granularity • Versioning: • Phased approach • Standard way of documenting typical changes • Human commentary • We should limit initial expectations
Other Issues (2) • Formulae • Not a high priority for the UK • Accept limitations of calculations • Practical application and extensibility • GCD • Use and reaction so far • Duplicate activity and loss of interoperability • Effort required - put on agenda for future consideration
SUMMARY OF XBRL IN THE UK • Successful implementation for fixed format and simple accounts • Now face challenge of implementing for large, variable format accounts with company extensions • Deadlines; requirements for international deliverables