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

Goodwill and Other Intangible Assets (Tables)

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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Rollforward of Goodwill
The following are the changes in the carrying value of goodwill:
(Millions of US dollars) Europe Building Products
Balance - 31 March 2022
 $ 199.5 
Foreign exchange impact (4.6)
Balance - 31 March 2023
 $ 194.9 
Foreign exchange impact (2.3)
Balance - 31 March 2024
 $ 192.6 
Schedule of Indefinite-Lived Intangible Assets
The following are the net carrying amount of indefinite lived intangible assets other than goodwill:
  31 March
(Millions of US dollars) 2024 2023
Trade names $ 111.0  $ 112.3 
Other 7.4  7.4 
Total $ 118.4  $ 119.7 
Schedule of Finite-Lived Intangible Assets
The following are the net carrying amount of amortizable intangible assets:
Year Ended 31 March 2024
(Millions of US dollars) Gross Carrying Amount Accumulated Amortization Net Carrying Amount
Customer Relationships $ 47.3  $ (16.5) $ 30.8 
Total $ 47.3  $ (16.5) $ 30.8 
Year Ended 31 March 2023
(Millions of US dollars) Gross Carrying Amount Accumulated Amortization Net Carrying Amount
Customer Relationships $ 47.9  $ (12.4) $ 35.5 
Total $ 47.9  $ (12.4) $ 35.5 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
At 31 March 2024, the estimated future amortization of intangible assets is as follows:
Years ended 31 March (Millions of US dollars):
2025 $ 4.4 
2026 4.6 
2027 4.8 
2028 4.9 
2029 4.6