ESMA has not yet released the detailed technical rules that will govern this vital digitization effort. XBRL International are particularly pleased to hear that the use of iXBRL will mean that securities filings in Europe will involve a single, integrated document that can be read by humans and at the same time digitally consumed by systems to assist in analysis and comparison. 

iXBRL is used by many regulators, including, most notably, HMRC and Companies House in the UK, the Danish Business Authority, the Japanese FSA, and the US Securities and Exchange Commission. Much of this data is already available, see a UK example and a US example.

The SEC has still not approved the IASB Taxonomy, so reporting issuers filing using IFRS with the SEC should not file xbrl exhibits.

Review the press release and the feedback statement detailing responses to the consultation paper on the ESMA's website.