PENSION AND OTHER POSTRETIREMENT BENEFITS (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of net benefit costs recognized

	Three months ended June 30,		Six months ended June 30,
	2021	2020	2021	2020
(millions of Canadian dollars)
Service cost	48	58	96	100
Interest cost	32	54	64	87
Expected return on plan assets	(84)	(113)	(168)	(180)
Amortization of actuarial loss and prior service costs	14	10	28	19
Net periodic benefit costs	10	9	20	26

For the three and six months ended June 30, 2020, we incurred $236 million in severance costs related to our voluntary workforce reduction program. For the three and six months ended June 30, 2021, there were no such costs incurred. Severance costs are included in Operating and administrative expense in the Consolidated Statements of Earnings.