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GUARANTEES AND CONTINGENCIES - Additional Information (Details) - Canada Revenue Agency (CRA) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Dec. 31, 2026
Sep. 30, 2026
Sep. 30, 2026
Loss Contingencies [Line Items]      
Estimated amount of loss resulting from an adverse tax position   $ 88.8  
Income taxes paid   $ 32.0  
Tax Year 2016      
Loss Contingencies [Line Items]      
Additional tax expense, (as a percent)   10.00%  
Tax Year 2015      
Loss Contingencies [Line Items]      
Additional tax expense, (as a percent)   10.00%  
Tax Year 2014      
Loss Contingencies [Line Items]      
Additional tax expense, (as a percent)   10.00%  
Tax Year 2013      
Loss Contingencies [Line Items]      
Additional tax expense, (as a percent)   10.00%  
Tax Year 2012      
Loss Contingencies [Line Items]      
Additional tax expense, (as a percent)   10.00%  
Tax Years 2017, 2018, 2019, 2020, and 2021      
Loss Contingencies [Line Items]      
Estimated amount of loss resulting from an adverse tax position   $ 470.0  
Tax Years 2020, and 2021      
Loss Contingencies [Line Items]      
Amount paid     $ 57.9
Tax Year 2021 | Forecast      
Loss Contingencies [Line Items]      
Amount paid $ 2.2    
Minimum | Tax Year 2016      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   90.0  
Minimum | Tax Year 2015      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   90.0  
Minimum | Tax Year 2014      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   90.0  
Minimum | Tax Year 2013      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   90.0  
Minimum | Tax Year 2012      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   90.0  
Maximum | Tax Year 2016      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   100.0  
Maximum | Tax Year 2015      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   100.0  
Maximum | Tax Year 2014      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   100.0  
Maximum | Tax Year 2013      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   100.0  
Maximum | Tax Year 2012      
Loss Contingencies [Line Items]      
Income tax examination, estimate of increase to taxable income   $ 100.0