v3.26.1
Product Warranties (Tables)
12 Months Ended
Mar. 31, 2026
Guarantees [Abstract]  
Schedule of Changes in Product Warranty Provision
The following are the changes in the product warranty accrual:
 March 31
(Millions of US dollars)20262025
Balance at beginning of period$34.2 $36.2 
Acquired as part of AZEK acquisition30.8 — 
Charges to cost of goods sold7.4 3.9 
Settlements made in cash or in kind(8.4)(5.9)
Balance at end of period$64.0 $34.2