An XBRL extension taxonomy concept replacement system includes: a computer processor having a memory on which a program executable by the processor is stored for performing a method of XBRL extension taxonomy concept replacement; an XBRL taxonomy module including an XBRL extension taxonomy having XBRL extension taxonomy concepts and an XBRL base taxonomy having related XBRL base taxonomy concepts; and an automated superfluous XBRL extension taxonomy concept detection module that analyzes an XBRL document having XBRL tags and identifies an XBRL extension taxonomy concept of an XBRL extension taxonomy that is superfluous in comparison with an XBRL base taxonomy concept of an XBRL base taxonomy upon which the XBRL extension taxonomy is based.