Postretirement benefit plans (Tables)

9 Months Ended

Sep. 30, 2019

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 September 30,	2019		2018		2019		2018		2019		2018
Service cost	$	4	$	5	$	1	$	1	$	7	$	8
Interest cost	9		9		4		4		11		11
Expected return on plan assets	(10)		(11)		(4)		(4)		(20)		(16)
Recognized net actuarial loss	3		4		—		1		6		5
Amortization of prior service cost (credit)	—		—		(1)		(1)		1		—
Net periodic benefit costs	6		7		—		1		5		8
Settlement losses	3		9		—		—		—		1
Total, including other postretirement losses	$	9	$	16	$	—	$	1	$	5	$	9

	U.S. Defined Benefit				U.S. Retiree Health Care				Non-U.S. Defined Benefit
For Nine Months Ended September 30,	2019		2018		2019		2018		2019		2018
Service cost	$	13	$	15	$	2	$	3	$	23	$	26
Interest cost	28		27		11		11		33		34
Expected return on plan assets	(31)		(32)		(11)		(11)		(64)		(50)
Recognized net actuarial loss	8		12		—		2		21		16
Amortization of prior service cost (credit)	—		—		(1)		(2)		1		(1)
Net periodic benefit costs	18		22		1		3		14		25
Settlement losses	9		11		—		—		2		2
Total, including other postretirement losses	$	27	$	33	$	1	$	3	$	16	$	27