Business Organization	6 Months Ended
Business Organization	Sep. 30, 2014
Business Organization [Abstract]
Business Organization	Note 1 – Business Organization Organization T-Rex Oil, Inc. (formerly Rancher Energy Corp.) (“T-Rex Oil” or the “Company”) was incorporated in Colorado on September 2, 2014. See Note 9 – Subsequent Events. The Company's business operations are in the development, production, and low risk exploration of oil and gas including unconventional natural gas, in the Rocky Mountain region of the continental United States; specifically, in the Rocky Mountain area of Utah, Colorado, Montana and Wyoming, and some Mid Continent areas. On August 19, 2014, the Company sold 129,851,356 pre-reverse shares of its restricted common stock to Texas Energy Corporation (“TEC”), a privately owned Colorado corporation, for $1,300,000 and therefore, as of September 30, 2014, TEC owns 52% of the issued and outstanding shares of common stock of the Company. See Note 7 – Purchase Agreement.

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.