Employee benefit plans (Tables)

12 Months Ended

Dec. 31, 2018

Employee benefit plans

Summary of changes in the benefit obligations, the plan assets and funded status

	Pension				Other Postretirement
	2018		2017		2018		2017
Change in benefit obligation:
Benefit obligation at beginning of year	$	654	$	614	$	39	$	64
Valuation effect at beginning of year		—		—		—		(2)
Service cost		6		5		—		—
Interest cost		22		24		2		2
Actuarial (gains) losses		(43)		38		(4)		1
Prior service credit		—		—		—		(1)
Benefits paid		(37)		(32)		(2)		(2)
Curtailments 1		—		—		—		(24)
Foreign exchange		(7)		5		(3)		1
Benefit obligation at end of year	$	595	$	654	$	32	$	39
Change in fair value of plan assets:
Fair value of plan assets at beginning of year	$	478	$	437	$	—	$	—
Actual (loss) return on plan assets		(20)		59		—		—
Employer contributions		16		9		3		2
Benefits paid		(35)		(30)		(3)		(2)
Expenses paid		(3)		(3)		—		—
Foreign exchange		(7)		6		—		—
Fair value of plan assets at end of year		429		478		—		—
Unfunded status at end of year	$	(166)	$	(176)	$	(32)	$	(39)
Assets and (liabilities) recognized in the Consolidated Balance Sheets:
Other assets	$	4	$	4	$	—	$	—
Accrued compensation and benefits		—		—		(1)		(2)
Pension and other postretirement benefits		(170)		(180)		(31)		(37)
	$	(166)	$	(176)	$	(32)	$	(39)

1The Company amended a postretirement plan at one of its operating divisions by eliminating employer paid subsidies toward retiree medical benefits as of December 31, 2017. The Company recognized a gain on settlement of $24 million during fiscal 2017, with an offsetting reduction to the benefit obligation.

Summary of net actuarial (loss) gain and prior service credit balance accumulated other comprehensive loss account, before related tax effects

	Pension						Other Postretirement
	2018		2017		2016		2018		2017		2016
Net actuarial (loss) gain	$	(63)	$	(54)	$	(89)	$	17	$	12	$	3
Prior service credit		—		—		—		1		1		3
Total recognized in accumulated other comprehensive loss (income)	$	(63)	$	(54)	$	(89)	$	18	$	13	$	6

Schedule of aggregate accumulated benefit obligation

	Pension
	2018		2017
Accumulated benefit obligation	$	536	$	587
Fair value of plan assets	$	367	$	407

Schedule of projected benefit obligation in excess of plan assets

	Pension
	2018		2017
Projected benefit obligation	$	553	$	605
Fair value of plan assets	$	383	$	425

Schedule of weighted average assumptions used to determine the benefit obligations

	Pension					Other Postretirement
	2018			2017		2018		2017
Discount rate		4.1	%	3.4	%	3.8	%	3.4	%
Rate of future compensation increase		3.5	%	3.5	%	3.6	%	3.6	%

Summary of the components of net periodic benefit cost

	Pension						Other Postretirement
	2018		2017		2016		2018		2017		2016
Service cost	$	4	$	3	$	2	$	—	$	—	$	1
Interest cost		22		24		26		2		2		2
Expected return on plan assets		(32)		(29)		(31)		—		—		—
Amortization of prior service credit		—		—		—		—		(2)		(2)
Amortization of net loss (gain)		1		1		2		(1)		—		—
Curtailment gain		—		—		—		—		(26)		—
Settlement loss recognized		—		—		3		—		—		—
Expenses paid		2		3		4		—		—		—
Net periodic benefit (credit) cost	$	(3)	$	2	$	6	$	1	$	(26)	$	1

Summary of other changes in plan assets and benefit obligations recognized in other comprehensive income

	Pension						Other Postretirement
	2018		2017		2016		2018		2017		2016
Net loss (gain)	$	10	$	8	$	11	$	(6)	$	—	$	(4)
Prior service credit		—		—		—		—		(1)		—
Amortization of prior service (cost) credit		—		—		—		—		2		—
Amortization of net (loss) gain		(1)		(1)		(4)		1		1		—
Curtailment loss		—		—		—		—		1		2
Total recognized in other comprehensive loss (income)	$	9	$	7	$	7	$	(5)	$	3	$	(2)
Total recognized in net periodic benefit (credit) cost and other comprehensive loss (income)	$	6	$	9	$	13	$	(4)	$	(23)	$	(1)

Schedule of weighted average assumptions used to determine the net periodic benefit cost

	Pension							Other Postretirement
	2018			2017		2016		2018		2017		2016
Discount rate		3.4	%	3.9	%	4.3	%	3.4	%	3.8	%	4.1	%
Rate of future compensation increase		3.5	%	3.5	%	3.5	%	3.6	%	3.6	%	3.5	%
Expected long-term return on plan assets		6.9	%	6.8	%	6.8	%	N/A		N/A		N/A

Schedule of pension plan asset allocation

	Asset Allocation
Asset Allocation	Range			2018
Cash and cash equivalents		0 - 16	%		1	%
U.S. equity securities		15 - 50	%		29	%
International equity securities		9 - 33	%		31	%
Fixed income		30 - 52	%		37	%
Other		0 - 14	%		2	%
					100	%

Schedule of fair value of pension plan assets by asset category segregated by level within the fair value hierarchy

	December 31, 2018								December 31, 2017
Asset Category	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
Cash and cash equivalents	$	5	$	5	$	—	$	—	$	6	$	6	$	—	$	—
U.S. equity securities		126		11		115		—		147		14		133		—
International equity securities		133		19		113		1		150		20		129		1
Fixed income		158		—		158		—		167		—		167		—
Other		7		—		7		—		8		—		8		—
Total assets at fair value	$	429	$	35	$	393	$	1	$	478	$	40	$	437	$	1

Schedule of expected benefit payments to be paid

	Pension		Other Postretirement
2019	$	34	$	2
2020		34		2
2021		34		2
2022		35		2
2023		35		2
Years 2024 - 2028		182		10