Expenses by nature (Tables)

12 Months Ended

Dec. 31, 2017

Expenses by nature

Schedule of operating expenses by nature

	For the year ended
	December 31,
	2017		2016
Employee salaries and benefits	$	595.4	$	549.2
Costs related to defined benefit plans (note 18(b)&(c))		(19.3)		0.3
Costs related to defined contribution plans (note 18(f))		16.7		14.5
Inventories used		103.5		128.8
Subcontractor costs relating to construction and service contracts		342.8		380.8
Materials, equipment, professional fees, travel and other		215.4		215.5
Direct costs, selling, general and administration		1,254.5		1,289.1
Depreciation and amortization		167.1		77.4
Foreign exchange loss (gain)		(13.5)		3.6
Share-based compensation expense (note 22(f))		57.9		14.7
Other expense (note 8)		119.4		5.9
	$	1,585.4	$	1,390.7