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

Income Taxes - Additional Information (Details)

v3.21.1
Income Taxes - Additional Information (Details)
$ in Millions, $ in Millions
12 Months Ended 60 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2021
AUD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2020
AUD ($)
Tax Credit Carryforward [Line Items]            
Tax loss carry-forwards $ 61.0          
Recognized tax deduction 110.9 $ 154.3        
Contribution to AICF 153.3   $ 108.9 $ 103.0 $ 558.5 $ 771.7
Foreign tax credit carry-forwards 122.1   $ 114.2   $ 114.2  
Prepaid Taxes 30.5          
Income tax paid, net of refunds 3.7          
Estimated tax refund, CARES Act 42.3          
Current taxes receivable, CARES Act 25.3          
Reduction in non-current taxes payable, CARES Act 17.0          
Income tax benefit, CARES Act 4.9          
Total amount of unrecognized tax benefits 0.5          
Interest and penalties recognized income tax expense 0.5          
Foreign Tax Credit Carry-Forwards            
Tax Credit Carryforward [Line Items]            
Foreign tax credit carry-forwards 119.5          
Research tax credit carry-forwards $ 2.6          
Percentage of valuation allowance against loss carry-forwards (as percent) 100.00%