Postretirement benefit plans (Tables)

6 Months Ended

Jun. 30, 2020

Retirement Benefits [Abstract]

Expense Related to Defined Benefit and Retiree Health Care Benefit Plans

Expense related to defined benefit and retiree health care benefit plans is as follows:

	U.S. Defined Benefit				U.S. Retiree Health Care				Non-U.S. Defined Benefit
For Three Months Ended June 30,	2020		2019		2020		2019		2020		2019
Service cost	$	5	$	5	$	—	$	—	$	8	$	8
Interest cost	8		10		3		4		10		11
Expected return on plan assets	(9)		(12)		(3)		(3)		(20)		(23)
Recognized net actuarial loss	2		3		—		—		4		8
Net periodic benefit costs	6		6		—		1		2		4
Settlement losses	3		3		—		—		—		1
Total, including other postretirement losses	$	9	$	9	$	—	$	1	$	2	$	5
	U.S. Defined Benefit				U.S. Retiree Health Care				Non-U.S. Defined Benefit
For Six Months Ended June 30,	2020		2019		2020		2019		2020		2019
Service cost	$	9	$	9	$	1	$	1	$	16	$	16
Interest cost	17		19		6		7		19		22
Expected return on plan assets	(18)		(21)		(6)		(7)		(38)		(44)
Recognized net actuarial loss	4		5		—		—		7		15
Net periodic benefit costs	12		12		1		1		4		9
Settlement losses	7		6		—		—		1		2
Total, including other postretirement losses	$	19	$	18	$	1	$	1	$	5	$	11