DEBT FACILITIES (Tables)

12 Months Ended

Mar. 31, 2021

Debt and Financing Obligations [Abstract]

Disclosure of detailed information about borrowings

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


			Repayment					2021				2020
Notional amount				period		Current	Non-current			Current	Non-current
Unsecured senior notes
U.S. dollar, fixed rate - 3.60% to 4.90%	US$	975.0		2021-2034	$	17.2	$	1,202.3	$	—	$	1,370.4
Canadian dollar, fixed rate - 4.15%	$	30.0		2021-2027		2.9		27.1		—		30.0

Term loans
U.S. dollar, variable rate	US$	176.4		2022-2025		71.2		149.3		79.7		177.1
Canadian dollar, variable rate	$	40.9		2021-2028		5.6		35.1		5.6		40.7
Other				2021-2026		15.3		54.7		8.2		7.9
Lease liabilities
U.S. dollar				2021-2041		60.8		110.7		91.7		214.4
Other				2021-2043		27.0		148.7		21.0		160.7

R&D obligations
Canadian dollar				2021-2039		16.3		407.3		—		391.5
Revolving credit facilities
U.S. dollar, variable rate						—		—		—		423.3
Canadian dollar, variable rate						—		—		—		290.0
Total long-term debt					$	216.3	$	2,135.2	$	206.2	$	3,106.0

Disclosure of reconciliation of liabilities arising from financing activities

Information on the change in liabilities 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			facilities		Total
Net book value as at April 1, 2019	$	1,368.2	$	352.3	$	525.1	$	348.5	$	—	$	2,594.1
Changes from financing cash flows
Net proceeds from borrowing under
revolving credit facilities		—		—		—		—		708.2		708.2
Proceeds from long-term debt		131.7		5.5		—		30.4		—		167.6
Repayment of long-term debt		(175.4)		(53.4)		—		(4.2)		—		(233.0)
Repayment of lease liabilities		—		—		(79.8)		—		—		(79.8)
Total changes from financing cash flows	$	(43.7)	$	(47.9)	$	(79.8)	$	26.2	$	708.2	$	563.0
Non-cash changes
Business combinations (Note 4)		—		—		1.6		—		—		1.6
Foreign currency exchange differences		75.2		14.7		13.8		—		5.1		108.8
Additions and remeasurement of lease liabilities		—		—		27.3		—		—		27.3
Accretion		—		—		—		16.8		—		16.8
Other		0.7		0.1		(0.2)		—		—		0.6
Total non-cash changes	$	75.9	$	14.8	$	42.5	$	16.8	$	5.1	$	155.1


Net book value as at March 31, 2020	$	1,400.4	$	319.2	$	487.8	$	391.5	$	713.3	$	3,312.2
Changes from financing cash flows
Net repayment from borrowing under
revolving credit facilities		—		—		—		—		(705.6)		(705.6)
Proceeds from long-term debt		—		127.2		—		23.9		—		151.1
Repayment of long-term debt		—		(86.1)		—		—		—		(86.1)
Repayment of lease liabilities		—		—		(200.8)		—		—		(200.8)
Total changes from financing cash flows	$	—	$	41.1	$	(200.8)	$	23.9		(705.6)	$	(841.4)
Non-cash changes
Business combinations (Note 4)		—		0.8		72.2		—		—		73.0
Foreign currency exchange differences		(151.4)		(30.2)		(31.5)		—		(7.7)		(220.8)
Additions and remeasurement of lease liabilities		—		—		26.9		—		—		26.9
Accretion		—		—		—		20.7		—		20.7
Other		0.5		0.3		(7.4)		(12.5)		—		(19.1)
Total non-cash changes	$	(150.9)	$	(29.1)	$	60.2	$	8.2	$	(7.7)	$	(119.3)
Net book value as at March 31, 2021	$	1,249.5	$	331.2	$	347.2	$	423.6	$	—	$	2,351.5