v3.26.1
Share-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions, $ in Millions
12 Months Ended
Jul. 01, 2025
USD ($)
$ / shares
Mar. 31, 2026
USD ($)
$ / shares
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2026
AUD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to share-based compensation cost   $ 58.3      
Estimated weighted average amortization, period of recognition   1 year 10 months 24 days      
Weighted-average remaining contractual term   1 year 7 months 6 days      
Aggregate intrinsic value         $ 0.0
Average closing price period   20 days      
Assumed Equity Awards | 2020 Omnibus Incentive Compensation Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to share-based compensation cost $ 22.1        
Assumed Equity Awards | AZEK Acquisition | 2020 Omnibus Incentive Compensation Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Estimated fair value of the assumed equity awards 182.1        
Estimated fair value of the assumed equity awards, recognized as goodwill $ 160.0        
Replacement Service-Based Stock Option Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Risk free interest rate, minimum 3.75%        
Risk free interest rate, maximum 3.88%        
Expected volatility, minimum 35.00%        
Expected volatility, maximum 40.00%        
Dividend yield (per annum) 0.00%        
Weighted-average remaining contractual term   4 years 4 months 24 days      
Aggregate intrinsic value         $ 37.0
Replacement Service-Based Stock Option Awards | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected life in years 2 years 5 months 19 days        
Replacement Service-Based Stock Option Awards | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected life in years 5 years 7 months 6 days        
Restricted Stock Units with Assumed and Replaeced          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value (in USD per share) | $ / shares $ 26.82 $ 26.82      
Cash Settled Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Cash paid to settle award   $ 30.0      
Share-based compensation expense   $ 6.3 $ 7.9 $ 5.1  
Vesting period   3 years