Postretirement benefit plans (Tables)

9 Months Ended

Sep. 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 September 30,	2020		2019		2020		2019		2020		2019
Service cost	$	5	$	4	$	1	$	1	$	9	$	7
Interest cost	7		9		3		4		9		11
Expected return on plan assets	(9)		(10)		(2)		(4)		(20)		(20)
Recognized net actuarial loss	1		3		—		—		4		6
Amortization of prior service cost (credit)	—		—		(1)		(1)		—		1
Net periodic benefit costs	4		6		1		—		2		5
Settlement losses	3		3		—		—		1		—
Total, including other postretirement losses	$	7	$	9	$	1	$	—	$	3	$	5
	U.S. Defined Benefit				U.S. Retiree Health Care				Non-U.S. Defined Benefit
For Nine Months Ended September 30,	2020		2019		2020		2019		2020		2019
Service cost	$	14	$	13	$	2	$	2	$	25	$	23
Interest cost	24		28		9		11		28		33
Expected return on plan assets	(27)		(31)		(8)		(11)		(58)		(64)
Recognized net actuarial loss	5		8		—		—		11		21
Amortization of prior service cost (credit)	—		—		(1)		(1)		—		1
Net periodic benefit costs	16		18		2		1		6		14
Settlement losses	10		9		—		—		2		2
Total, including other postretirement losses	$	26	$	27	$	2	$	1	$	8	$	16