Pension and other benefits (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Net Periodic Benefit Cost for Defined Benefit Pension Plans and Other Benefits

Net periodic benefit (recovery) cost for defined benefit pension plans and other benefits included the following components:        

	For the three months ended March 31
	Pensions				Other benefits				Total
(in millions of Canadian dollars)	2024		2023		2024		2023		2024		2023
Current service cost	$	21	$	18	$	3	$	2	$	24	$	20
Other components of net periodic benefit (recovery) cost:
Interest cost on benefit obligation	117		121		6		5		123		126
Expected return on plan assets	(223)		(220)		—		—		(223)		(220)
Recognized net actuarial loss	10		8		—		—		10		8
Amortization of prior service costs	2		—		—		—		2		—
Total other components of net periodic benefit (recovery) cost	(94)		(91)		6		5		(88)		(86)
Net periodic benefit (recovery) cost	$	(73)	$	(73)	$	9	$	7	$	(64)	$	(66)