SEGMENT AND CUSTOMER REPORTING (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Information regarding each reportable segment for the periods indicated is set forth below:

Revenue by segment:	Three months ended March 31
	2025				2024
			% of total				% of total
ATS	$	807.2	30	%	$	767.9	35	%
CCS
Communications	$	1,427.7	54	%	$	764.2	34	%
Enterprise	413.7		16	%	676.8		31	%
	$	1,841.4	70	%	$	1,441.0	65	%
Total revenue	$	2,648.6			$	2,208.9

Segment Costs by segment:	Three months ended March 31
	2025		2024
ATS cost of sales	$	726.5	$	701.2
ATS other Segment Costs	40.0		34.8
CCS cost of sales	1,630.6		1,289.5
CCS other Segment Costs	63.7		52.8
Total Segment Costs	$	2,460.8	$	2,078.3

Schedule of Reconciliation of Operating Profit (Loss) from Segments to Consolidated

Segment income, segment margin, and reconciliation of segment income to earnings before income taxes:		Three months ended March 31
	Note	2025				2024
				Segment Margin				Segment Margin
ATS segment income and margin		$	40.7	5.0	%	$	31.9	4.2	%
CCS segment income and margin		147.1		8.0	%	98.7		6.8	%
Total segment income		187.8				130.6
Reconciling items:
Finance costs		13.7				14.0
Miscellaneous expense	12	1.4				6.6
Foreign currency forward contracts transitional adjustments		—				(0.5)
Employee SBC expense		26.0				22.7
TRS fair value adjustment (TRS FVA): losses (gains)		19.1				(31.5)
Amortization of intangible assets (excluding computer software)		10.0				9.3
Restructuring and other charges, net of recoveries	11	3.9				4.8
Earnings before income taxes		$	113.7			$	105.2