Employee retirement benefits

3 Months Ended

Mar. 31, 2021

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	2021			2020
Pension benefits:
Current service cost		81			76
Interest cost		68			77
Expected return on plan assets		(107	)		(98	)
Amortization of prior service cost		4			4
Amortization of actuarial loss (gain)		36			38
Net periodic benefit cost		82			97
Other postretirement benefits:
Current service cost		7			6
Interest cost		6			6
Amortization of actuarial loss (gain)		4			3
Net periodic benefit cost		17			15