v3.26.1
INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Amount      
Canadian Federal tax $ 128,832 $ 127,749 $ 193,263
Canadian provincial tax 33,530    
Effect of foreign tax rate differences   (9,275) (18,338)
Other items (23,430) 15,171 13,423
Difference in tax filing positions from provision 6,450 (37,053) (2,661)
Change in valuation allowance   (4,040) 71,328
Effect of changes in unrecognized tax benefits (16,126)    
Provision for income taxes $ 215,614 $ 46,005 $ 264,012
Tax Jurisdiction of Domicile [Extensible Enumeration] Canada    
%      
Canadian Federal tax 15.00% 26.50% 26.50%
Canadian provincial tax 3.90%    
Other items (2.70%)    
Difference in tax filing positions from provision 0.008    
Effect of changes in unrecognized tax benefits (1.90%)    
Provision for income taxes 25.10%    
Other foreign jurisdictions      
Amount      
Effect of foreign tax rate differences $ 56,630    
%      
Effect of foreign tax rate differences 6.60%    
United States      
Amount      
Effect of foreign tax rate differences $ 7,794    
Net controlled foreign corporation tested income (NCTI) 14,913    
Foreign-derived deduction-eligible income (FDDEI) (8,670)    
Effect of foreign tax credits (27,687)    
Includable foreign income (deductions) 16,004    
Impact of reorganizations 12,790    
Other items $ 11,552    
%      
Effect of foreign tax rate differences 0.90%    
Net controlled foreign corporation tested income (NCTI) 1.70%    
Foreign-derived deduction-eligible income (FDDEI) (1.00%)    
Effect of foreign tax credits (3.20%)    
Includable foreign income 0.019    
Impact of reorganizations 1.50%    
Other items 1.30%    
United Kingdom      
Amount      
Effect of foreign tax rate differences $ 6,356    
Includable foreign income (deductions) (19,534)    
Impact of reorganizations 9,170    
Other items 271    
Change in valuation allowance $ 6,769    
%      
Effect of foreign tax rate differences 0.70%    
Includable foreign income (0.023)    
Impact of reorganizations 1.10%    
Other items 0.00%    
Change in valuation allowance 0.80%