Employee benefit plans (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Pension Plans [Member]

Schedule of Defined Benefit Plan Expected Future Payments

Benefit payments to plan participants out of plan assets are expected to be the equivalent of:

2013	$ 27.9 million
2014	28.5 million
2015	28.4 million
2016	28.4 million
2017	29.2 million
Next 5 years	162.0 million

Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)

The table below details the changes in other comprehensive income (loss) during 2010, 2011 and 2012.

	Years ended December 31,
	2010			2011			2012
	(In millions)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net actuarial loss	$	(11.4	)	$	(30.1	)	$	(66.7	)
Amortization of unrecognized:
Prior service cost		.9			1.2			1.1
Net transition obligations		.5			.5			.4
Net actuarial gain		7.0			8.2			9.7
Plan amendment		(3.8	)		—			—
Total	$	(6.8	)	$	(20.2	)	$	(55.5	)

Composition of Pension Plan Assets

The composition of our December 31, 2011 and 2012 pension plan assets by fair value level is shown in the table below. The amounts shown for plan assets invested in the CMRT include a nominal amount of cash held by our U.S. pension plan which is not part of the plan’s investment in the CMRT.

	Fair Value Measurements at December 31, 2011
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In millions)
Germany	$	187.2	$	—	$	—	$	187.2
Canada:
Local currency equities		18.1		18.1		—		—
Foreign equities		28.0		28.0		—		—
Local currency fixed income		33.8		33.8		—		—
Cash and other		2.4		2.4		—		—
Norway:
Local currency equities		2.0		2.0		—		—
Foreign equities		3.7		3.7		—		—
Local currency fixed income		35.9		35.9		—		—
Foreign fixed income		4.3		4.3		—		—
Real estate		5.1		—		—		5.1
Cash and other		6.3		4.9		—		1.4
U.S. – CMRT		45.4		.1		45.3		—
Other		16.9		10.0		—		6.9
Total	$	389.1	$	143.2	$	45.3	$	200.6
	Fair Value Measurements at December 31, 2012
	Total		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In millions)
Germany	$	224.8	$	—	$	—	$	224.8
Canada:
Local currency equities		22.4		22.4		—		—
Foreign currency equities		30.3		30.3		—		—
Local currency fixed income		38.0		38.0		—		—
Global mutual fund		5.6		5.6		—		—
Cash and other		2.1		2.1		—		—
Norway:
Local currency equities		3.2		3.2		—		—
Foreign currency equities		5.2		5.2		—		—
Local currency fixed income		40.9		40.9		—		—
Foreign currency fixed income		4.8		4.8		—		—
Real estate		5.5		—		—		5.5
Cash and other		7.6		7.0		—		.6
U.S. – CMRT		50.7		—		50.7		—
Other		19.5		12.3		—		7.2
Total	$	460.6	$	171.8	$	50.7	$	238.1

Schedule of Rollforward of Change in Fair Value of Level 3 Assets

A rollforward of the change in fair value of Level 3 assets follows.

	Years ended December 31,
	2011			2012
	(In millions)
Fair value at beginning of year	$	214.9		$	200.6
Gain on assets held at end of year		18.8			33.0
Gain on assets sold during the year		1.8			.1
Assets purchased		18.6			15.1
Assets sold		(18.1	)		(14.3	)
Transfers out		(29.2	)		(1.0	)
Currency exchange rate fluctuations		(6.2	)		4.6
Fair value at end of year	$	200.6		$	238.1

U.S. defined benefit pension plans [Member]

Schedule of Funded Status

The funded status of our U.S. defined benefit pension plans is presented in the table below.

	Years ended December 31,
	2011			2012
	(In millions)
Change in projected benefit obligations (“PBO”):
Balance at beginning of the year	$	59.8		$	65.3
Interest cost		2.9			2.7
Actuarial loss		6.2			4.9
Benefits paid		(3.6	)		(3.8	)
Balance at end of the year	$	65.3		$	69.1
Change in plan assets:
Fair value at beginning of the year	$	50.4		$	45.4
Actual return on plan assets		(1.6	)		6.9
Employer contributions		.2			2.2
Benefits paid		(3.6	)		(3.8	)
Fair value at end of year	$	45.4		$	50.7
Funded status	$	(19.9	)	$	(18.4	)
Amounts recognized in the Consolidated Balance Sheets:
Accrued pension costs:
Current	$	(.3	)	$	(.3	)
Noncurrent		(19.6	)		(18.1	)
Total		(19.9	)		(18.4	)
Accumulated other comprehensive loss -
Actuarial loss		37.3			38.1
Total	$	17.4		$	19.7
Accumulated benefit obligations (“ABO”)	$	65.3		$	69.1

Components of Net Periodic Defined Benefit Pension Benefit Cost (Credit)

The amounts shown below for the amortization of unrecognized actuarial losses for 2010, 2011 and 2012 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2009, 2010 and 2011, respectively, net of deferred income taxes and noncontrolling interest.

	Years ended December 31,
	2010			2011			2012
	(In millions)
Net periodic pension benefit cost (credit) for U.S. plans:
Interest cost	$	3.2		$	2.9		$	2.7
Expected return on plan assets		(4.2	)		(4.8	)		(4.5	)
Amortization of unrecognized net actuarial loss		1.2			1.0			1.6
Total	$	.2		$	(.9	)	$	(.2	)

Schedule of Plans for which Accumulated Benefit Obligations Exceeds Plan Assets

Certain information concerning our U.S. defined benefit pension plans is presented in the table below.

	December 31,
	2011		2012
	(In millions)
Plans for which the ABO exceeds plan assets:
Projected benefit obligations	$	65.3	$	69.1
Accumulated benefit obligations		65.3		69.1
Fair value of plan assets		45.4		50.7

Summary of Actuarial Assumptions Used to Benefit Obligations

The impact of assumed increases in future compensation levels does not have an effect on the periodic pension cost as the plan is frozen with regards to compensation.

Rate	Years ended December 31,
	2010			2011			2012
Discount rate		5.7	%		5.1	%		4.2	%
Long-term return on plan assets		10.0	%		10.0	%		10.0	%

Foreign Pension Plan Defined Benefit [Member]

Schedule of Funded Status

The funded status of our foreign defined benefit pension plans is presented in the table below.

	Years ended December 31,
	2011			2012
	(In millions)
Change in PBO:
Balance at beginning of the year	$	454.8		$	469.7
Service cost		11.2			10.4
Interest cost		24.1			22.8
Participants’ contributions		1.9			1.8
Actuarial loss		18.4			95.9
Change in currency exchange rates		(13.4	)		15.3
Benefits paid		(27.3	)		(24.4	)
Balance at end of the year	$	469.7		$	591.5
Change in plan assets:
Fair value at beginning of the year	$	334.8		$	343.7
Actual return on plan assets		18.2			49.0
Employer contributions		25.7			28.2
Participants’ contributions		1.9			1.8
Change in currency exchange rates		(9.6	)		11.6
Benefits paid		(27.3	)		(24.4	)
Fair value at end of year	$	343.7		$	409.9
Funded status	$	(126.0	)	$	(181.6	)
Amounts recognized in the Consolidated Balance Sheets:
Pension asset	$	—		$	5.1
Accrued pension costs:
Current		(1.3	)		(1.9	)
Noncurrent		(124.7	)		(184.8	)
Total		(126.0	)		(181.6	)
Accumulated other comprehensive loss:
Actuarial loss		133.9			190.8
Prior service cost		6.5			5.4
Net transition obligations		1.7			1.3
Total		142.1			197.5
Total	$	16.1		$	15.9
ABO	$	437.5		$	545.9

Components of Net Periodic Defined Benefit Pension Benefit Cost (Credit)

During 2011, certain eligible participants elected to take lump sum distributions upon their retirement, resulting in a nominal settlement charge in 2011.

	Years ended December 31,
	2010			2011			2012
	(In millions)
Net periodic pension cost for foreign plans:
Service cost	$	10.4		$	11.2		$	10.4
Interest cost		22.3			24.1			22.8
Settlement loss		—			.5			—
Expected return on plan assets		(16.8	)		(18.0	)		(17.4	)
Amortization of unrecognized:
Prior service cost		.9			1.2			1.1
Net transition obligations		.5			.5			.4
Net actuarial loss		5.8			6.8			8.0
Total	$	23.1		$	26.3		$	25.3

Schedule of Plans for which Accumulated Benefit Obligations Exceeds Plan Assets

Certain information concerning our foreign defined benefit pension plans is presented in the table below.

	December 31,
	2011		2012
	(In millions)
Plans for which the ABO exceeds plan assets:
Projected benefit obligations	$	469.7	$	529.4
Accumulated benefit obligations		437.5		491.5
Fair value of plan assets		343.7		342.7

Summary of Actuarial Assumptions Used to Benefit Obligations

A summary of our key actuarial assumptions used to determine foreign benefit obligations as of December 31, 2011 and 2012 was:

	December 31,
Rate	2011			2012
Discount rate		4.9	%		3.7	%
Increase in future compensation levels		3.1	%		3.1	%

Foreign Pension Plans, Defined Benefit, Foreign Net Periodic [Member]

Summary of Actuarial Assumptions Used to Benefit Obligations

A summary of our key actuarial assumptions used to determine foreign net periodic benefit cost for 2010, 2011 and 2012 are as follows:

	Years ended December 31,
Rate	2010			2011			2012
Discount rate		5.5	%		5.1	%		4.9	%
Increase in future compensation levels		3.0	%		3.0	%		3.1	%
Long-term return on plan assets		5.5	%		5.5	%		5.2	%

CMRT [Member]

Composition of Pension Plan Assets

The aggregate fair value of all of the CMRT assets, including funds of Contran and its other affiliates that also invest in the CMRT, and supplemental asset mix details of the CMRT are as follows:

	December 31,
	2011			2012
	(In millions)
CMRT asset value	$	659.5		$	726.4
CMRT fair value input:
Level 1		82	%		82	%
Level 2		1			1
Level 3		17			17
		100	%		100	%
CMRT asset mix:
Domestic equities, principally publicly traded		75	%		43	%
International equities, publicly traded		2			2
Fixed income securities, publicly traded		14			12
Privately managed limited partnerships		8			8
Other, primarily cash		1			35
		100	%		100	%

OPEB [Member]

Schedule of Defined Benefit Plan Expected Future Payments

Benefit payments to OPEB plan participants are expected to be the equivalent of:

2013	$ 1.6 million
2014	1.5 million
2015	1.4 million
2016	1.3 million
2017	1.2 million
Next 5 years	5.3 million

Schedule of Funded Status

The funded status of our OPEB plans is presented in the table below.

	Years ended December 31,
	2011			2012
	(In millions)
Actuarial present value of accumulated OPEB obligations:
Balance at beginning of the year	$	21.4		$	22.1
Service cost		.2			.3
Interest cost		1.0			.8
Actuarial loss		.9			.4
Change in currency exchange rates		(.2	)		.3
Benefits paid from employer contributions		(1.2	)		(1.2	)
Balance at end of the year	$	22.1		$	22.7
Fair value of plan assets	$	—		$	—
Funded status	$	(22.1	)	$	(22.7	)
Accrued OPEB costs recognized in the Consolidated Balance Sheets:
Current	$	(1.7	)	$	(1.5	)
Noncurrent		(20.4	)		(21.2	)
Total		(22.1	)		(22.7	)
Accumulated other comprehensive income (loss):
Net actuarial loss		3.4			3.8
Prior service credit		(12.3	)		(10.5	)
Total		(8.9	)		(6.7	)
Total	$	(31.0	)	$	(29.4	)

Components of Net Periodic Defined Benefit Pension Benefit Cost (Credit)

The components of our periodic OPEB cost are presented in the table below. The amounts shown below for the amortization of unrecognized actuarial loss and prior service credit for 2010, 2011 and 2012 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2010, 2011 and 2012, respectively, net of deferred income taxes and noncontrolling interest.

	Years ended December 31,
	2010			2011			2012
	(In millions)
Net periodic OPEB cost (credit):
Service cost	$	.6		$	.2		$	.3
Interest cost		1.2			1.0			.8
Amortization of unrecognized prior service credit		(.7	)		(2.3	)		(1.8	)
Total	$	1.1		$	(1.1	)	$	(.7	)

Summary of Actuarial Assumptions Used to Benefit Obligations

A summary of our key actuarial assumptions used to determine the net benefit obligations as of December 31, 2011 and 2012 follows:

	December 31,
	2011			2012
Healthcare inflation:
Initial rate		8.0	%		7.0	%
Ultimate rate		5.0	%		5.0	%
Year of ultimate rate achievement		2018			2018
Discount rate		3.93	%		3.47	%

Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss)

The table below details the changes in other comprehensive income during 2010, 2011 and 2012.

	Years ended December 31,
	2010			2011			2012
	(In millions)
Changes in benefit obligations recognized in other comprehensive income (loss):
Net actuarial loss arising during the year	$	(2.3	)	$	(.9	)	$	(.4	)
Plan amendments		9.5			—			—
Amortization of unrecognized prior service credit		(.7	)		(2.3	)		(1.8	)
Total	$	6.5		$	(3.2	)	$	(2.2	)