Pension and other benefits (Tables)

9 Months Ended

Sep. 30, 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 September 30
	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	116		122		6		5		122		127
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	(95)		(90)		6		5		(89)		(85)
Net periodic benefit (recovery) cost	$	(74)	$	(72)	$	9	$	7	$	(65)	$	(65)

	For the nine months ended September 30
	Pensions				Other benefits				Total
(in millions of Canadian dollars)	2024		2023		2024		2023		2024		2023
Current service cost	$	63	$	53	$	9	$	7	$	72	$	60
Other components of net periodic benefit (recovery) cost:
Interest cost on benefit obligation	350		365		18		16		368		381
Expected return on plan assets	(668)		(661)		—		—		(668)		(661)
Recognized net actuarial loss	30		24		—		—		30		24
Amortization of prior service costs	5		1		—		1		5		2
Total other components of net periodic benefit (recovery) cost	(283)		(271)		18		17		(265)		(254)
Net periodic benefit (recovery) cost	$	(220)	$	(218)	$	27	$	24	$	(193)	$	(194)