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Provisions - (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of other provisions [line items]

Schedule showing breakdown of non-current and current provisions

		2018						2017
		Non- Current		Current		Total		Non- Current		Current		Total
		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000
Provision for pensions		52,529		197		52,726		59,195		—		59,195
Environmental provision		2,880		331		3,211		3,121		346		3,467
Provisions for litigation		—		2,399		2,399		—		11,732		11,732
Provisions for third-party liability		7,270		—		7,270		7,639		—		7,639
Provisions for C02 emissions allowances		2,859		25,111		27,970		—		7,281		7,281
Other provisions		10,249		12,532		22,781		12,442		13,736		26,178
Total		75,787		40,570		116,357		82,397		33,095		115,492

Schedule of changes in provisions

The changes in the various line items of provisions in 2018 and 2017 were as follows:

						Provisions for		Provisions for		Provisions for
		Provision for		Environmental		Litigation		Third		CO2 Emissions		Other
		Pensions		Provision		in Progress		Party Liability		Allowances		Provisions		Total
		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000
Balance at January 1, 2017		60,876		3,083		—		5,835		5,512		26,278		101,584
Charges for the year		5,082		133		10,807		2,451		6,946		1,494		26,913
Provisions reversed with a credit to income		(1,321)		—		(237)		(181)		—		(545)		(2,284)
Amounts used		(2,304)		(93)		—		—		(5,907)		(2,911)		(11,215)
Provision against equity		(4,511)		—		—		—		—		—		(4,511)
Transfers from/(to) other accounts		—		—		931		(12)		—		(612)		307
Exchange differences and others		1,373		344		231		(454)		730		1,009		3,233
Transfer from liabilities associated with assets held for sale (see Note 29)		—		—		—		—		—		1,465		1,465
Balance at December 31, 2017		59,195		3,467		11,732		7,639		7,281		26,178		115,492
Charges for the year		4,611		103		392		229		26,348		2,483		34,166
Provisions reversed with a credit to income		(36)		—		—		(9)		—		(1,524)		(1,569)
Amounts used		(2,076)		—		(9,595)		(239)		(5,470)		(3,039)		(20,419)
Provision against equity		(3,568)		—		—		—		—		—		(3,568)
Transfers from/(to) other accounts		277		—		—		—		—		—		277
Exchange differences and others		(5,677)		(359)		(130)		(350)		(189)		(2,035)		(8,740)
Additions from business combinations (see Note 5)		—		—		—		—		—		735		735
Disposals from business divestitures		—		—		—		—		—		(17)		(17)
Balance at December 31, 2018		52,726		3,211		2,399		7,270		27,970		22,781		116,357

France

Disclosure of other provisions [line items]

Schedule showing changes in obligation

		2018		2017
		US$'000		US$'000
Obligations at the beginning of year		29,768		29,733
Current service cost		1,678		1,834
Borrowing costs		470		383
Actuarial differences		(700)		(4,570)
Benefits paid		(1,818)		(1,471)
Exchange differences		(1,349)		3,859
Obligations at the end of year		28,049		29,768

Schedule of estimated future benefit payments

The following table reflects the gross benefit payments that are expected to be paid for the benefit plans for the year ended December 31, 2018:

		2018
		US$'000
2019		1,597
2020		977
2021		1,179
2022		1,329
2023		2,007
Years 2024-2028		8,628

South Africa

Disclosure of other provisions [line items]

Schedule showing changes in obligation

In this regard, the changes of this provision in 2018 and 2017 were as follows:

		2018		2017
		US$'000		US$'000
Obligations at beginning of year		7,872		8,760
Current service cost		139		310
Borrowing costs		740		932
Actuarial differences		(2,000)		(2,226)
Benefits paid		(226)		(740)
Exchange differences		(1,096)		836
Obligations at end of year		5,429		7,872

Schedule of breakdown in percentage of plan assets

The breakdown, in percentage, of the plan assets are as follows:

		2018		2017
Cash		1.72	%	47.45	%
Equity		47.42	%	24.79	%
Bond		13.62	%	7.66	%
Property		2.67	%	1.41	%
International		30.27	%	15.74	%
Others		4.30	%	2.95	%
Total		100.00	%	100.00	%

Schedule showing fair value rollforward of plan assets

Changes in the fair value of plan assets linked to the defined benefit plans in South Africa were as set forth in the following table:

		2018		2017
		US$'000		US$'000
Fair value of plan assets at the beginning of the year		2,248		3,532
Interest income on assets		216		255
Benefits paid		(50)		(2,609)
Actuarial differences		(228)		270
Other		(280)		800
Fair value of plan assets at the end of the year		1,906		2,248
Actual return on assets		(11)		525

Venezuela

Disclosure of other provisions [line items]

Schedule showing changes in obligation

In this regards, the changes of this provision in 2018 and 2017 were as follows:

		2018		2017
		US$'000		US$'000
Obligations at the beginning of year		1,883		2,955
Current service cost		775		158
Borrowing costs		—		2,255
Benefits paid		(35)		(93)
Exchange differences		(2,089)		(3,392)
Obligations at the end of year		534		1,883

Summary of the main actuarial assumptions used to calculate obligations

The summary of the main actuarial assumptions used to calculate the aforementioned obligations is as follows:

		France				South Africa				Venezuela
		2018		2017		2018		2017		2018		2017
Salary increase		1.60%-6.10%		1.60%-6.10%		7.2	%	8.1	%	400000	%	207.25	%
Discount rate		2%		2%		9.9	%	10.3	%	520004	%	219.54	%
Expected inflation rate		1.60%		1.60%		6.2	%	7.10	%	500000	%	207	%
Mortality		TGH05/TGF05		TGH05/TGF05		SA 85-90 / PA (90)		SA 85-90 / PA (90)		UP94		UP94
Retirement age		65		65		63		63		64		63

North America

Disclosure of other provisions [line items]

Schedule showing changes in obligation

The changes to these obligations in the current year ended December 31, 2018 were as follows:

		2018
		USA		Canada
		Pension		Pension		Post-retirement
		Plans		Plans		Plans		Total
		US$'000		US$'000		US$'000		US$'000
Obligations at the beginning of year		38,195		24,788		8,837		71,820
Service cost		185		123		334		642
Borrowing cost		1,300		816		297		2,413
Actuarial differences		(2,849)		(416)		(1,240)		(4,505)
Benefits paid		(1,874)		(978)		(161)		(3,013)
Exchange differences		—		(1,940)		(690)		(2,630)
Expenses		(70)		—		—		(70)
Plan amendments		175		—		—		175
Obligations at the end of year		35,062		22,393		7,377		64,832

Schedule of estimated future benefit payments

The following reflects the gross benefit payments that are expected to be paid in future years for the benefit plans for the year ended December 31:

				Non-pension
				Postretirement
		Pension Plans		Plans
		US$'000		US$'000
2019		3,175		197
2020		3,205		197
2021		3,241		203
2022		3,247		203
2023		3,311		222
Years 2024-2028		17,178		1,393

Schedule of breakdown in percentage of plan assets

The breakdown as of December 31, 2018 and 2017 of the assets by class are:

		2018		2017
Cash		1	%	2	%
Equity Mutual Funds		40	%	45	%
Fixed Income Securities		59	%	51	%
Real Estate Mutual Funds		—	%	2	%
Total		100	%	100	%

Schedule showing fair value rollforward of plan assets

For the year ended December 31, 2018, the changes in plan assets were as follows:

		2018
		USA		Canada
		Pension		Pension
		Plans		Plans		Total
		US$'000		US$'000		US$'000
Fair value of plan assets at the beginning of the year		32,869		19,283		52,152
Interest income on assets		1,110		643		1,753
Benefits paid		(1,874)		(978)		(2,852)
Actuarial return on plan assets		(3,044)		(1,154)		(4,198)
Other		(23)		(718)		(741)
Fair value of plan assets at the end of the year		29,038		17,076		46,114

Summary of the main actuarial assumptions used to calculate obligations

The assumptions used to determine benefit obligations at December 31, 2018 and 2017 for the North American plans are as follows:

North America – 2018

North America – 2017

USA

Canada

USA

Canada

Pension

Pension

Postretirement

Pension

Pension

Postretirement

Plan

Plan

Plan

Plan

Plan

Plan

Salary increase

N/A

2.75% - 3.00%

N/A

N/A

2.75% - 3.00%

N/A

Discount rate

4.00%

3.80%

3.90%

3.50%

3.60%

3.65%

Expected inflation rate

N/A

N/A

N/A

N/A

N/A

N/A

Mortality

SOA RP-2014 Blue Collar Mortality

CPM2014-Private

CPM2014-Private

SOA RP-2014 Total Dataset Mortality

CPM2014-Private

CPM2014-Private

Retirement age

65

62

62

65

62

62

Schedule showing reconciliation of benefit obligations, plan assets and funded status

Benefit Obligations and Funded Status – The following provides a reconciliation of the benefit obligations, plan assets and funded status of the North American plans as of December 31, 2018 and 2017:

		2018								2017
		USA		Canada						USA		Canada
						Post-								Post-
		Pension		Pension		retirement				Pension		Pension		retirement
		Plans		Plans		Plans		Total		Plans		Plans		Plans		Total
		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000		US$'000
Benefit obligation		35,062		22,393		7,377		64,832		38,195		24,788		8,837		71,820
Fair value of plan assets		(29,038)		(17,076)		—		(46,114)		(32,869)		(19,283)		—		(52,152)
Provision for pensions		6,024		5,317		7,377		18,718		5,326		5,505		8,837		19,668

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