CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenue	$ 2,648.6	$ 2,208.9
Cost of sales	2,374.7	1,986.8
Gross profit	273.9	222.1
Selling, general and administrative expenses	112.5	64.8
Research and development	17.6	16.5
Amortization of intangible assets	11.1	10.2
Restructuring and other charges, net of recoveries	3.9	4.8
Earnings from operations	128.8	125.8
Finance costs	13.7	14.0
Miscellaneous expense	1.4	6.6
Earnings before income taxes	113.7	105.2
Income tax expense (recovery)
Current	27.6	10.7
Deferred	(0.1)	2.7
Income tax expense	27.5	13.4
Net earnings	$ 86.2	$ 91.8
Earnings per share:
Basic (in dollars per share)	$ 0.74	$ 0.77
Diluted (in dollars per share)	$ 0.74	$ 0.77
Weighted-average shares used in computing per share amounts (in millions):
Basic (in shares)	115.9	119.0
Diluted (in shares)	116.9	119.3