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v3.22.1

Employee retirement benefits | 3 Months Ended
--- | ---
Mar. 31, 2022
Employee retirement benefits |
4. | Employee retirement benefits
The components of net benefit cost were as follows:
|  | Three Months to March 31 |
millions of Canadian dollars |  | 2022 |  |  | 2021 |
Pension benefits: |  |  |  |  |  |  |  |
Service cost |  |  | 70 |  |  |  | 81 |
Interest cost |  |  | 73 |  |  |  | 68 |
Expected return on plan assets |  |  | (103 | ) |  |  | (107 | )
Amortization of prior service cost |  |  | 4 |  |  |  | 4 |
Amortization of actuarial loss (gain) |  |  | 22 |  |  |  | 36 |
Net benefit cost |  |  | 66 |  |  |  | 82 |
Other postretirement benefits: |  |  |  |  |  |  |  |
Service cost |  |  | 6 |  |  |  | 7 |
Interest cost |  |  | 6 |  |  |  | 6 |
Amortization of actuarial loss (gain) |  |  | 2 |  |  |  | 4 |
Net benefit cost |  |  | 14 |  |  |  | 17 |

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