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Goodwill and Other Intangible Assets

12 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The following are the changes in the carrying value of goodwill:


(Millions of US dollars)	Europe Building Products
Balance - 31 March 2021	$	209.3
Foreign exchange impact	(9.8)
Balance - 31 March 2022	$	199.5
Foreign exchange impact	(4.6)
Balance - 31 March 2023	$	194.9

Intangible Assets

The following are the net carrying amount of indefinite lived intangible assets other than goodwill:


	31 March
(Millions of US dollars)	2023		2022
Tradenames	$	112.3	$	115.0
Other	7.4		7.4
Total	$	119.7	$	122.4

The following are the net carrying amount of amortizable intangible assets:


	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


	Year Ended 31 March 2022
(Millions of US dollars)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer Relationships	$	52.9	$	(12.5)	$	40.4
Total	$	52.9	$	(12.5)	$	40.4

The amortization of intangible assets was US$3.8 million, US$3.5 million and US$2.6 million for the fiscal years ended 31 March 2023, 2022 and 2021, respectively.

At 31 March 2023, the estimated future amortization of intangible assets is as follows:


Years ended 31 March (Millions of US dollars):
2024	$	4.3
2025	4.5
2026	4.6
2027	4.9
2028	5.0