This document discusses mapping financial data from XBRL filings to Linked Open Data. It describes using ReDeFer to convert XBRL XML instances and schemas to RDF, generating over 1.3 million triples. A prototype demonstrates publishing and querying the semantic XBRL dataset using the Rhizomer tool. While the initial mapping is straightforward, the author notes the resulting RDF could be tailored further and semantic mappings could facilitate cross-querying financial data across filings, companies and accounting principles.