Stockholders' Equity	9 Months Ended
	Dec. 31, 2020
Stockholders' Equity [Abstract]
7. Stockholders' Equity	7. Stockholders' Equity The dividends declared or paid during the first nine months of fiscal 2021 were as follows: Common Stock Dividends Declared Date   Per Share Amount   Record Date   Dividend Date               August 20, 2020 $ 0.50   September 7, 2020   September 21, 2020 December 9, 2020 $ 2.00   December 21, 2020   December 30, 2020   As of December 31, 2020, no awards had been issued under the 2016 AMERCO Stock Option Plan.