Postretirement benefits (Tables)

9 Months Ended

Sep. 30, 2019

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
	2019						2018						2019			2018
Three Months Ended September 30	U.S. Plans			Non-U.S. Plans			U.S. Plans			Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	12		$	3		$	14		$	3		$	—		$	1
Non-service cost:
Interest cost	30			6			26			6			1			1
Expected return on plan assets	(47		)	(11		)	(53		)	(12		)	(1		)	(2		)
Amortization of net actuarial loss	—			1			—			1			—			—
Amortization of prior service cost	—			—			—			—			(20		)	(21		)
Curtailments	—			—			—			—			—			(1		)
Settlements	1			—			—			—			—			—
Total non-service (benefit) cost	(16		)	(4		)	(27		)	(5		)	(20		)	(23		)
Net periodic (benefit) cost	$	(4	)	$	(1	)	$	(13	)	$	(2	)	$	(20	)	$	(22	)

	Pension Benefit Plans												Other Postretirement Benefit Plans
	2019						2018						2019			2018
Nine Months Ended September 30	U.S. Plans			Non-U.S. Plans			U.S. Plans			Non-U.S. Plans
(in millions of U.S. dollars)
Service cost	$	37		$	8		$	43		$	9		$	—		$	1
Non-service cost:
Interest cost	89			20			79			20			3			3
Expected return on plan assets	(142		)	(33		)	(159		)	(38		)	(3		)	(4		)
Amortization of net actuarial loss	—			2			—			1			—			—
Amortization of prior service cost	—			—			—			—			(60		)	(64		)
Curtailments	—			—			—			—			—			(2		)
Settlements	1			—			1			—			—			—
Total non-service (benefit) cost	(52		)	(11		)	(79		)	(17		)	(60		)	(67		)
Net periodic (benefit) cost	$	(15	)	$	(3	)	$	(36	)	$	(8	)	$	(60	)	$	(66	)

The service and non-service cost components of net periodic (benefit) cost reflected in the Consolidated statements of operations were as follows:

	Pension Benefit Plans						Other Postretirement Benefit Plans
Three Months Ended September 30	2019			2018			2019			2018
(in millions of U.S. dollars)
Service Cost:
Losses and loss expenses	$	2		$	2		$	—		$	—
Administrative expenses	13			15			—			1
Total service cost	15			17			—			1
Non-service Cost:
Losses and loss expenses	(1		)	(3		)	(2		)	(3		)
Administrative expenses	(19		)	(29		)	(18		)	(20		)
Total non-service (benefit) cost	(20		)	(32		)	(20		)	(23		)
Net periodic (benefit) cost	$	(5	)	$	(15	)	$	(20	)	$	(22	)

	Pension Benefit Plans						Other Postretirement Benefit Plans
Nine Months Ended September 30	2019			2018			2019			2018
(in millions of U.S. dollars)
Service Cost:
Losses and loss expenses	$	5		$	5		$	—		$	—
Administrative expenses	40			47			—			1
Total service cost	45			52			—			1
Non-service Cost:
Losses and loss expenses	(5		)	(8		)	(6		)	(7		)
Administrative expenses	(58		)	(88		)	(54		)	(60		)
Total non-service (benefit) cost	(63		)	(96		)	(60		)	(67		)
Net periodic (benefit) cost	$	(18	)	$	(44	)	$	(60	)	$	(66	)