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EMPLOYEE BENEFITS OBLIGATIONS (Tables)
 12 Months Ended
Mar. 31, 2021
Disclosure of share-based payments arrangements [Abstract]  
Disclosure of net defined benefit liability (asset)
The employee benefits obligations are as follows:
20212020
Funded defined benefit pension obligations$761.5 $649.2 
Fair value of plan assets641.9 530.1 
Funded defined benefit pension obligations – net$119.6 $119.1 
Unfunded defined benefit pension obligations102.6 93.7 
Employee benefits obligations$222.2 $212.8 

Changes in funded defined benefit pension obligations and fair value of plan assets are as follows:
  2021  2020
CanadianForeignTotalCanadianForeignTotal
Pension obligations, beginning of year$576.9 $72.3 $649.2 $597.2 $67.2 $664.4 
Current service cost28.4 2.4 30.8 30.4 2.1 32.5 
Interest cost20.5 1.1 21.6 18.0 1.1 19.1 
Past service cost1.0 (2.8)(1.8)— — — 
Actuarial loss (gain) arising from:    
Experience adjustments(0.6)(1.7)(2.3)9.2 0.4 9.6 
Economic assumptions72.3 9.1 81.4 (64.3)0.5 (63.8)
Demographic assumptions— (1.3)(1.3)— (0.4)(0.4)
Employee contributions7.4 0.5 7.9 7.2 0.6 7.8 
Pension benefits paid(18.9)(1.4)(20.3)(20.8)(1.5)(22.3)
Foreign currency exchange differences— (3.7)(3.7)— 2.3 2.3 
Pension obligations, end of year$687.0 $74.5 $761.5 $576.9 $72.3 $649.2 
Fair value of plan assets, beginning of year$467.8 $62.3 $530.1 $485.3 $58.4 $543.7 
Interest income16.9 1.0 17.9 14.9 0.9 15.8 
Return on plan assets, excluding amounts    
included in interest income79.7 6.3 86.0 (40.0)(0.2)(40.2)
Employer contributions22.7 1.9 24.6 22.1 2.3 24.4 
Employee contributions7.4 0.5 7.9 7.2 0.6 7.8 
Pension benefits paid(18.9)(1.4)(20.3)(20.8)(1.5)(22.3)
Administrative costs(0.9)(0.2)(1.1)(0.9)(0.2)(1.1)
Foreign currency exchange differences— (3.2)(3.2)— 2.0 2.0 
Fair value of plan assets, end of year$574.7 $67.2 $641.9 $467.8 $62.3 $530.1 

Changes in unfunded defined benefit pension obligations are as follows:
  2021  2020
 CanadianForeignTotalCanadianForeignTotal
Pension obligations, beginning of year$78.0 $15.7 $93.7 $77.2 $14.7 $91.9 
Current service cost3.2 0.6 3.8 3.3 0.6 3.9 
Interest cost2.6 0.2 2.8 2.1 0.2 2.3 
Past service cost— — — — (0.1)(0.1)
Actuarial loss (gain) arising from:  
Experience adjustments— — — 7.7 (0.6)7.1 
Economic assumptions7.9 (0.8)7.1 (7.2)1.1 (6.1)
Pension benefits paid(3.1)(0.7)(3.8)(2.8)(0.7)(3.5)
Business combinations— — — (2.3)— (2.3)
Foreign currency exchange differences— (1.0)(1.0)— 0.5 0.5 
Pension obligations, end of year$88.6 $14.0 $102.6 $78.0 $15.7 $93.7 
Disclosure of additional information about defined benefit plans
Net pension cost is as follows:
  2021  2020
 CanadianForeignTotalCanadianForeignTotal
Funded plans      
Current service cost$28.4 $2.4 $30.8 $30.4 $2.1 $32.5 
Interest cost20.5 1.1 21.6 18.0 1.1 19.1 
Interest income(16.9)(1.0)(17.9)(14.9)(0.9)(15.8)
Past service cost1.0 (2.8)(1.8)— — — 
Administrative cost0.9 0.2 1.1 0.9 0.2 1.1 
Net pension cost of funded plans$33.9 $(0.1)$33.8 $34.4 $2.5 $36.9 
Unfunded plans     
Current service cost$3.2 $0.6 $3.8 $3.3 $0.6 $3.9 
Interest cost2.6 0.2 2.8 2.1 0.2 2.3 
Past service cost— — — — (0.1)(0.1)
Net pension cost of unfunded plans$5.8 $0.8 $6.6 $5.4 $0.7 $6.1 
Total net pension cost$39.7 $0.7 $40.4 $39.8 $3.2 $43.0 
Disclosure of fair value of plan assets Fair value of the plan assets, by major categories, are as follows:
 (amounts in millions)
20212020
  QuotedUnquotedTotalQuotedUnquotedTotal
Canadian plans       
Equity funds
      
Canadian$— $78.2 $78.2 $— $55.2 $55.2 
Foreign— 187.3 187.3 — 165.7 165.7 
Bond funds
Government— 113.0 113.0 — 92.2 92.2 
Corporate— 104.3 104.3 — 85.2 85.2 
Cash and cash equivalents
— 11.2 11.2 — 4.3 4.3 
Other
— 80.7 80.7 — 65.2 65.2 
Total Canadian plans $— $574.7 $574.7 $— $467.8 $467.8 
Foreign plans       
Insured annuities
$— $60.3 $60.3 $— $55.9 $55.9 
Equity instruments
2.6 — 2.6 2.4 — 2.4 
Debt instruments
Corporate3.7 — 3.7 3.5 — 3.5 
Other
— 0.6 0.6 — 0.5 0.5 
Total Foreign plans $6.3 $60.9 $67.2 $5.9 $56.4 $62.3 
Total plans $6.3 $635.6 $641.9 $5.9 $524.2 $530.1 
Assumptions for defined benefit plans
Significant assumptions (weighted average) used are as follows:
 CanadianForeign
 2021202020212020
Pension obligations as at March 31:    
Discount rate3.32 %3.96 %1.06 %1.46 %
Compensation rate increases3.65 %3.66 %3.01 %2.92 %
Net pension cost for years ended March 31:
Discount rate3.96 %3.33 %1.46 %1.64 %
Compensation rate increases3.66 %3.66 %2.92 %2.92 %
Assumptions regarding future mortality are based on actuarial advice in accordance with published statistics and mortality tables and experience in each territory. The mortality tables and the average life expectancy in years for a member age 45 and 65 are as follows:
As at March 31, 2021Life expectancy over 65 for a member
(in years)
 Male  Female
CountryMortality tableat age 45at age 65 at age 45at age 65
CanadaCPM private tables23.522.125.624.3
NetherlandsAG202023.321.425.323.4
GermanyHeubeck RT2018G23.120.326.023.8
United KingdomS2PxA CMI 2020 23.022.025.223.9
United StatesCPM private tables24.823.426.325.0

As at March 31, 2020Life expectancy over 65 for a member
(in years)
   Male Female
CountryMortality tableat age 45at age 65at age 45at age 65
CanadaCPM private tables 23.522.025.624.3
NetherlandsAG201823.921.825.923.7
GermanyHeubeck RT2018G23.020.225.923.7
United KingdomS2PxA CMI 201823.122.025.122.0
United StatesCPM private tables 24.723.326.224.9
Disclosure of sensitivity analysis for actuarial assumptions
The impact on the defined benefit obligation as a result of a 0.25% change in the significant assumptions as at March 31, 2021 are as follows:
 Funded plans Unfunded plans 
Canadian ForeignCanadianForeignTotal
Discount rate:       
Increase$(30.3)
$
(3.8)
$
(2.9)
$
(0.4)
$
(37.4)
Decrease32.5 4.1 3.1 0.5 40.2 
Compensation rate:      
Increase8.3 0.2 0.5 — 9.0 
Decrease(8.5)(0.2)(0.5)— (9.2)
Expected future employer contribution
Contributions reflect actuarial assumptions of future investment returns, salary projections and future service benefits. The expected employer contributions and expected benefits paid for the next fiscal year are as follows:
CanadianForeignTotal
Expected employer contributions in funded plans

$22.3 $2.3 $24.6 
Expected benefits paid in unfunded plans3.5 0.7 4.2