Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Dividends - Disclosure of Detailed Information About Dividends Explanatory (Details) (Parenthetical)

v3.21.1
Dividends - Disclosure of Detailed Information About Dividends Explanatory (Details) (Parenthetical)
12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2019
Statement Line Items [Line Items]      
Applicable tax rate 28.00% 28.00% 28.00%
Australian Franking Credits [Member]      
Statement Line Items [Line Items]      
Tax rate effect of foreign tax rates 30.00% 30.00%  
New Zealand Imputation Credits [Member]      
Statement Line Items [Line Items]      
Applicable tax rate 28.00% 28.00%