Postretirement benefits (Tables)

3 Months Ended

Mar. 31, 2021

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:

	Pension Benefit Plans								Other Postretirement Benefit Plans
	2021				2020				2021		2020
Three Months Ended March 31	U.S. Plans		Non-U.S. Plans		U.S. Plans		Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	—	$	1	$	—	$	1	$	—	$	—
Non-service cost (benefit):
Interest cost	18		5		25		6		—		1
Expected return on plan assets	(64)		(11)		(56)		(10)		—		(1)
Amortization of net actuarial loss	—		1		—		—		—		—
Amortization of prior service cost	—		—		—		—		(20)		(20)
Settlements	—		—		1		—		—		—
Total non-service cost (benefit)	(46)		(5)		(30)		(4)		(20)		(20)
Net periodic benefit cost (benefit)	$	(46)	$	(4)	$	(30)	$	(3)	$	(20)	$	(20)

The line items in which the service cost and non-service cost (benefit) components of net periodic benefit cost (benefit) are included in the Consolidated statements of operations were as follows:

	Pension Benefit Plans				Other Postretirement Benefit Plans
Three Months Ended March 31	2021		2020		2021		2020
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses	$	—	$	—	$	—	$	—
Administrative expenses	1		1		—		—
Total service cost	1		1		—		—
Non-service cost (benefit):
Losses and loss expenses	(5)		(3)		(2)		(2)
Administrative expenses	(46)		(31)		(18)		(18)
Total non-service cost (benefit)	(51)		(34)		(20)		(20)
Net periodic benefit cost (benefit)	$	(50)	$	(33)	$	(20)	$	(20)