DEBT FACILITIES (Tables)

12 Months Ended

Mar. 31, 2023

Debt and Financing Obligations [Abstract]

Disclosure of detailed information about borrowings

Long-term debt, net of transaction costs is as follows:


			Repayment					2023				2022
Notional amount				period		Current	Non-current			Current	Non-current
Unsecured senior notes
U.S. dollar, fixed rate - 3.60% to 4.90%	US$	947.0		2024-2034	$	18.5	$	1,257.9	$	17.4	$	1,176.5
Canadian dollar, fixed rate - 4.15%	$	24.3		2024-2027		2.9		21.4		2.9		24.2

Term loans
U.S. dollar, variable rate	US$	350.0		2024-2025		67.0		405.4		69.7		443.1
Canadian dollar, variable rate	$	29.6		2023-2028		5.6		23.8		5.6		29.4
Other				2023-2026		15.2		47.4		14.1		58.4
Lease liabilities
U.S. dollar				2023-2053		55.7		241.3		66.1		164.6
Other				2023-2043		25.5		133.4		32.9		131.4

R&D obligations
Canadian dollar				2023-2042		24.2		471.9		33.1		439.9
Revolving credit facilities
U.S. dollar, variable rate						—		433.0		—		336.9

Total long-term debt					$	214.6	$	3,035.5	$	241.8	$	2,804.4

Disclosure of reconciliation of liabilities arising from financing activities

Information on the change in long-term debt for which cash flows have been classified as financing activities in the statement of cash flows are as follows:


	Unsecured								Revolving
		senior		Term		Lease		R&D		credit
		notes		loans		liabilities	obligations			facility		Total
Net book value as at March 31, 2021	$	1,249.5	$	331.2	$	347.2	$	423.6	$	—	$	2,351.5
Changes from financing cash flows
Net repayment from borrowing under
revolving credit facilities		—		—		—		—		344.6		344.6
Proceeds from long-term debt		—		402.3		—		26.8		—		429.1
Repayment of long-term debt		(20.5)		(110.8)		—		(0.8)		—		(132.1)
Repayment of lease liabilities		—		—		(89.5)		—		—		(89.5)
Total changes from financing cash flows	$	(20.5)	$	291.5	$	(89.5)	$	26.0	$	344.6	$	552.1
Non-cash changes
Business combinations (Note 2)		—		0.2		34.9		—		—		35.1
Foreign currency exchange differences		(8.5)		(4.1)		(7.8)		—		(7.7)		(28.1)
Additions and remeasurement of lease liabilities		—		—		119.6		—		—		119.6
Accretion		—		—		—		25.3		—		25.3
Other		0.5		1.5		(9.4)		(1.9)		—		(9.3)
Total non-cash changes	$	(8.0)	$	(2.4)	$	137.3	$	23.4	$	(7.7)	$	142.6


Net book value as at March 31, 2022	$	1,221.0	$	620.3	$	395.0	$	473.0	$	336.9	$	3,046.2
Changes from financing cash flows
Net proceeds from borrowing under
revolving credit facilities		—		—		—		—		44.5		44.5
Proceeds from long-term debt		—		—		—		31.2		—		31.2
Repayment of long-term debt		(21.8)		(106.1)		—		(33.1)		—		(161.0)
Repayment of lease liabilities		—		—		(83.4)		—		—		(83.4)
Total changes from financing cash flows	$	(21.8)	$	(106.1)	$	(83.4)	$	(1.9)	$	44.5	$	(168.7)
Non-cash changes

Foreign currency exchange differences		101.1		48.9		21.7		—		51.6		223.3
Additions and remeasurement of lease liabilities		—		—		128.2		—		—		128.2
Accretion		—		—		—		25.0		—		25.0
Other		0.4		1.3		(5.6)		—		—		(3.9)
Total non-cash changes	$	101.5	$	50.2	$	144.3	$	25.0	$	51.6	$	372.6
Net book value as at March 31, 2023	$	1,300.7	$	564.4	$	455.9	$	496.1	$	433.0	$	3,250.1