PENSION AND OTHER POSTRETIREMENT BENEFITS

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

PENSION AND OTHER POSTRETIREMENT BENEFITS

PENSION AND OTHER POSTRETIREMENT BENEFITS

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
(millions of Canadian dollars)
Service cost	51		62		116		116
Interest cost	42		47		87		79
Expected return on plan assets	(80	)	(73	)	(162	)	(124	)
Amortization of actuarial loss	8		8		15		17
Plan curtailments	2		—		2		—
Amortization of prior service costs	—		—		(1	)	—
Net periodic benefit costs	23		44		57		88