The Federal Energy Regulatory Commission (FERC) posted a proposal to require the use of XBRL for reporting Commission Form Nos. 1, 1-F, 2, 2-A, 3-Q electric, 3-Q natural gas, 6, 6-Q, 60, and 714 for utilities. The proposal is out for a 30 day comment period which ends March 6, 2019.
Read the proposal.