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BENEFIT PLANS: (Tables)

12 Months Ended

Dec. 31, 2012

Post retirement defined benefit plan

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

		Years ended December 31,
(in millions)		2012			2011			2010
Service cost		$	1.0		$	0.9		$	2.1
Interest cost		1.1			1.2			2.2
Expected return on plan assets		(3.6		)	(3.5		)	(3.7		)
Amortization of transition assets, net		—			(0.1		)	—
Amortization of net actuarial loss		(0.8		)	(1.3		)	(1.0		)
Amortization of net loss/(gain)		0.1			0.1			0.1
Amortization of prior service cost/ (credit)		—			—			0.2
Settlement / curtailment		—			—			(19.0		)
Net periodic benefit cost		$	(2.2	)	$	(2.7	)	$	(19.1	)

Schedule of changes in the benefit obligation and plan assets, the funded status of the plans and the amount recognized in balance sheet and accumulated other comprehensive income

		As of December 31,
(in millions)		2012			2011
Change in benefit obligation:
Projected benefit obligation at beginning of year		$	25.2		$	25.2
Service cost		1.0			0.9
Interest cost		1.1			1.2
Actuarial gain census		(0.1		)	0.2
Benefits paid		(2.0		)	(1.9		)
Actuarial (gain)/loss		1.0			(0.4		)
Actuarial gain assumption changes		0.8			1.3
Inflation adjustment		0.9			(1.3		)
Projected benefit obligation at end of year		$	27.9		$	25.2
Change in plan assets:
Fair value of plan assets at beginning of year		$	55.8		$	62.9
Actual return on plan assets		4.9			—
Employer contributions		(0.6		)	(0.5		)
Benefits paid		(1.1		)	(1.2		)
Currency exchange rate adjustment		2.9			(5.4		)
Fair value of plan assets at end of year		$	61.9		$	55.8
Funded status at end of year:		$	34.0		$	30.6
ASC-715 amounts recognized in statement of financial position consists of:
Non-current assets		$	34.0		$	30.6
Total		$	34.0		$	30.6
ASC-715 amounts recognized in accumulated other comprehensive income (net of income tax) consists of:
Net loss (gain)		$	(3.6	)	$	(3.9	)
Total		$	(3.6	)	$	(3.9	)

Schedule of changes in accumulated other comprehensive income

The following table summarizes the changes in accumulated other comprehensive income for the years ended December 31, related to the defined benefit pension plan, net of income tax:

(in millions)		2012			2011
Reconciliation of accumulated other comprehensive income:
Accumulated other comprehensive income at beginning of plan year		$	(3.9	)	$	(8.8	)
Net loss/(gain)amortized during the year		0.2			0.7
Net loss/(gain)occurring during the year		0.6			2.9
Currency exchange rate adjustment		(0.5		)	1.3
Net adjustment to accumulated other comprehensive income		0.3			4.9
Accumulated other comprehensive income at end of plan year		$	(3.6	)	$	(3.9	)

Summary of the amounts in accumulative other comprehensive income amortized and recognized as a component of net periodic benefit cost, net of tax

The following table summarizes the amounts in accumulative other comprehensive income amortized and recognized as a component of net periodic benefit cost in 2012 and 2011, net of income tax:

(in millions)		2012			2011
Net loss / (gain)		$	0.6		$	2.9
Amortization of net (loss) gain		0.2			0.7
Total amortization expenses		$	0.8		$	3.6

Scheduled maturities of the benefits expected to be paid in each of the next five years, and thereafter

Years		Expected Benefit Payments
		(in millions)
2013		$	9.6
2014		1.6
2015		1.7
2016		1.6
2017		1.6
2018 to 2022		8.4
Total		$	24.5

Post-retirement Health Care Plan

Components of net periodic benefit costs

Schedule of components of net periodic benefit costs

		Years ended December 31,
(in millions)		2012			2011			2010
Service cost		$	—		$	—		$	0.4
Interest cost		1.5			3.3			4.4
Amortization of transition obligation		—			1.3			1.5
Amortization of net loss/(gain)		—			—			0.1
Amortization of prior service cost/ (credit)		(0.3		)	(10.0		)	—
Net periodic benefit cost		$	1.2		$	(5.4	)	$	6.4

Schedule of changes in the benefit obligation and plan assets, the funded status of the plans and the amount recognized in balance sheet and accumulated other comprehensive income

		As of December 31,
(in millions)		2012			2011
Change in benefit obligation:
Projected benefit obligation at beginning of year		$	20.3		$	51.4
Interest cost		1.5			3.3
Amendments		—			(24.2		)
Actuarial loss/ (gain) — claims cost		(0.2		)	—
Benefits paid		(1.5		)	(1.4		)
Actuarial (gain)/loss		5.6			(3.3		)
Actuarial gain assumption changes		0.1			0.2
Inflation adjustment		1.4			(5.7		)
Projected benefit obligation at end of year		$	27.2		$	20.3
Change in plan assets:
Fair value of plan assets at beginning of year		$	—		$	—
Employer contributions		0.1			0.1
Benefits paid		(0.1		)	(0.1		)
Fair value of plan assets at end of year		$	—		$	—
Funded status at end of year:		$	(27.2	)	$	(20.3	)
ASC-715 amounts recognized in statement of financial position consists of:
Current liabilities		$	(0.1	)	$	(0.1	)
Non-current liabilities		(27.1		)	(20.2		)
Total		$	(27.2	)	$	(20.3	)
ASC-715 amounts recognized in accumulated other comprehensive income (net of income tax) consists of:
Net loss (gain)		$	(0.2	)	$	(3.4	)
Prior service cost (credit)		(0.1		)	(0.1		)
Total		$	(0.3	)	$	(3.5	)

Schedule of changes in accumulated other comprehensive income

		As of December 31,
(in millions)		2012			2011
Reconciliation of accumulated other comprehensive income:
Accumulated other comprehensive income at beginning of plan year		$	(3.5	)	$	8.6
Prior services cost amortized during the year		—			6.0
Net loss/(gain)occurring during the year		3.3			(1.9		)
Amortization of transition obligation		0.2			(0.8		)
Prior service cost (credit)		—			(14.5		)
Currency exchange rate adjustment		(0.3		)	(0.9		)
Net adjustment to accumulated other comprehensive income		3.2			(12.1		)
Accumulated other comprehensive income at end of plan year		$	(0.3	)	$	(3.5	)

Summary of the amounts in accumulative other comprehensive income amortized and recognized as a component of net periodic benefit cost, net of tax

The following table summarizes the amounts in accumulative other comprehensive income amortized and recognized as a component of net periodic benefit cost in 2012 and 2011, net of income tax:

		As of December 31,
(in millions)		2012			2011
Net loss / (gain)		$	3.3		$	(1.9	)
Amortization of transition obligation		0.2			(0.8		)
Amortization of prior services cost (credit)		—			(14.5		)
Total amortization expenses		$	3.5		$	(17.2	)

Scheduled maturities of the benefits expected to be paid in each of the next five years, and thereafter

Year		Expected Benefit Payments
		(in millions)
2013		$	1.6
2014		1.6
2015		1.7
2016		1.8
2017		2.0
2018 to 2022		11.7
Total		$	20.4

Peruvian operations | Post retirement defined benefit plan

Components of net periodic benefit costs

Schedule of assumptions used to determine the pension obligation and seniority premiums as of year-end and the net cost

Peruvian operations		2012		2011		2010
Discount rate		3.35	%	3.95	%	5.00	%
Expected long-term rate of return on plan asset		4.50	%	4.50	%	4.50	%
Rate of increase in future compensation level		N/A		N/A		N/A

Peruvian operations | Post-retirement Health Care Plan

Components of net periodic benefit costs

Schedule of assumptions used to determine the pension obligation and seniority premiums as of year-end and the net cost

The discount rates used in the calculation of other post-retirement benefits and cost as of December 31 were:

Peruvian operations		2012		2011		2010
Discount rate		3.35	%	3.95	%	5.00	%

Schedule of effects of one percentage-point change in assumed other benefits cost trend rates

		One Percentage Point
(in millions)		Increase			Decrease
Effect on total service and interest cost components		$	1.5		$	(0.8	)
Effect on the post-retirement benefit obligation		$	28.6		$	(22.7	)

Mexican operations | Post retirement defined benefit plan

Components of net periodic benefit costs

Schedule of assumptions used to determine the pension obligation and seniority premiums as of year-end and the net cost

Mexican operations (*)		2012		2011		2010
Discount rate		6.50	%	7.50	%	7.50	%
Expected long-term rate of return on plan asset		6.50	%	7.50	%	7.50	%
Rate of increase in future compensation level		4.00	%	4.50	%	4.00	%

(*)These rates are based on Mexican pesos as pension obligations are denominated in pesos.

Schedule of asset mix of the investment portfolio

The following table represents the asset mix of the investment portfolio as of December 31:

		2012		2011
Asset category:
Equity securities		73	%	74	%
Treasury bills		27	%	26	%
		100	%	100	%

Mexican operations | Post-retirement Health Care Plan

Components of net periodic benefit costs

Schedule of assumptions used to determine the pension obligation and seniority premiums as of year-end and the net cost

The discount rates used in the calculation of other post-retirement benefits and cost as of December 31 were:

Mexican operations		2012		2011		2010
Weighted average discount rate		6.50	%	7.50	%	7.50	%

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+ References

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