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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Schedule of Assumptions Used [Table Text Block]

	Pension Benefits																		OPEB
	2011						2010						2009						2011			2010			2009
	U.S.			U.K			U.S.			U.K			U.S.			U.K.
Discount rate	5.10	%		4.65	%		5.70	%		5.35	%		6.10	%		5.70	%		5.10	%		5.70	%		6.00	%
Expected return on plan assets	8.00	%		4.60	%		8.00	%		6.00	%		8.00	%		6.25	%		N/A			N/A			N/A
Rate of compensation increase	4.00	%		3.25	%		3.75	%		3.65	%		3.75	%		3.75	%		4.00	%		3.75	%		3.75	%

Change in Benefit Obligation and Plan Assets [Table Text Block]

	Pension Benefits								OPEB
	December 31,								December 31,
	2011				2010				2011				2010
	(in millions)								(in millions)
Change in benefit obligation
Benefit obligation at beginning of year	$	665.4			$	619.6			$	564.3			$	507.1
Service cost	4.8				4.9				0.9				1.0
Interest cost	37.1				36.8				17.1				16.1
Plan amendments	—				4.4				—				—
Actuarial loss	45.5				35.3				11.4				25.4
Change in GM portion of OPEB obligation	—				—				16.2				25.1
Participant contributions	0.6				0.7				—				—
Curtailments	(2.5		)		0.1				(10.0		)		—
Benefit payments	(33.7		)		(33.6		)		(11.5		)		(10.4		)
Currency fluctuations	(0.5		)		(2.8		)		—				—
Net change	51.3				45.8				24.1				57.2
Benefit obligation at end of year	$	716.7			$	665.4			$	588.4			$	564.3
Change in plan assets
Fair value of plan assets at beginning of year	$	412.4			$	358.7			$	—			$	—
Actual return on plan assets	11.0				44.7				—				—
Employer contributions	52.0				44.0				11.5				10.4
Participant contributions	0.6				0.7				—				—
Benefit payments	(33.7		)		(33.6		)		(11.5		)		(10.4		)
Currency fluctuations	(0.6		)		(2.1		)		—				—
Net change	29.3				53.7				—				—
Fair value of plan assets at end of year	$	441.7			$	412.4			$	—			$	—

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

	Pension Benefits								OPEB
	December 31,								December 31,
	2011				2010				2011				2010
	(in millions)								(in millions)
Current liabilities	$	(1.2	)		$	(1.2	)		$	(29.4	)		$	(28.8	)
Noncurrent liabilities	(273.8		)		(251.8		)		(559.0		)		(535.5		)
Net liability	$	(275.0	)		$	(253.0	)		$	(588.4	)		$	(564.3	)

Schedule of Pre-tax Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Pension Benefits								OPEB
	December 31,								December 31,
	2011				2010				2011				2010
	(in millions)								(in millions)
Net actuarial gain (loss)	$	(230.3	)		$	(171.2	)		$	(1.8	)		$	9.2
Net prior service credit	0.9				1.0				13.6				28.8
Deferred curtailment gain	—				—				22.0				—
Total amounts recorded	$	(229.4	)		$	(170.2	)		$	33.8			$	38.0

Schedule of Net Benefit Costs [Table Text Block]

	Pension Benefits												OPEB
	2011				2010				2009				2011				2010				2009
	(in millions)												(in millions)
Service cost	$	4.8			$	4.9			$	5.2			$	0.9			$	1.0			$	2.3
Interest cost	37.1				36.8				36.1				17.1				16.1				17.8
Expected asset return	(31.9		)		(31.8		)		(30.4		)		—				—				—
Amortized actuarial loss (gain)	4.5				2.5				1.3				0.4				(1.4		)		(1.7		)
Amortized prior service credit	(0.1		)		—				(0.1		)		(3.2		)		(3.1		)		(5.4		)
Special and contractual
termination benefits	—				—				2.5				—				—				(0.7		)
Curtailments	—				0.2				(1.5		)		—				—				(68.0		)
Settlement	0.1				—				0.4				—				—				—
Net periodic benefit cost (credit)	$	14.5			$	12.6			$	13.5			$	15.2			$	12.6			$	(55.7	)

Schedule of Weighted Average Allocation of Pension Plan Assets [Table Text Block]

	U.S.									U.K.
							Target									Target
	2011			2010			Allocation			2011			2010			Allocation
Equity securities	50.8	%		51.6	%		50	%		44.5	%		50.5	%		45% - 55%
Fixed income securities	35.5			32.8			30% - 35%			47.9			44.3			45% - 55%
Hedge funds	13.5			11.0			0% - 15%			—			—			0%
Cash	0.2			4.6			0% - 5%			7.6			5.2			0% - 5%
Total	100.0	%		100.0	%					100.0	%		100.0	%

Schedule of Fair Value Hierarchy by Asset Category for Postretirement Benefit Plan Assets [Table Text Block]

December 31, 2011
Asset Categories		Level 1				Level 2				Level 3				Total
		(in millions)
Cash & Cash Equivalents		$	8.0			$	—			$	—			$	8.0
Equity
U.S. Large Cap		88.6				—				—				88.6
U.S. Small/Mid Cap		43.5				—				—				43.5
World Equity		65.3				20.6				—				85.9
Fixed Income Securities
Government & Agencies		56.6				—				—				56.6
Corporate Bonds - Investment Grade		68.5				—				—				68.5
Corporate Bonds - Non-investment Grade		25.3				—				—				25.3
Emerging Market Debt		11.8				—				—				11.8
Other		7.0				—				—				7.0
Hedge Funds
Multi Strategy Hedge Fund		—				—				46.5				46.5
Total Plan Assets		$	374.6			$	20.6			$	46.5			$	441.7
December 31, 2010
Asset Categories		Level 1				Level 2				Level 3				Total
		(in millions)
Cash & Cash Equivalents		$	19.5			$	—			$	—			$	19.5
Equity
U.S. Large Cap		68.2				2.6				—				70.8
U.S. Small/Mid Cap		45.0				4.3				—				49.3
World Equity		54.6				37.2				—				91.8
Fixed Income Securities
Government & Agencies		44.1				—				—				44.1
Corporate Bonds - Investment Grade		59.8				—				—				59.8
Corporate Bonds - Non-investment Grade		28.5				—				—				28.5
Emerging Market Debt		9.0				—				—				9.0
Other		3.9				—				—				3.9
Hedge Funds
Multi Strategy Hedge Fund		—				—				35.7				35.7
Total Plan Assets		$	332.6			$	44.1			$	35.7			$	412.4

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

	December 31,
	2011				2010
	(in millions)
Beginning balance	$	35.7			$	35.3
Actual return on plan assets:
Relating to assets still held at the reporting date	(0.5		)		0.4
Purchases, sales and settlements, net	11.3				—
Ending balance	$	46.5			$	35.7

X

- Definition

Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits, as well as a tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements.

+ References

No definition available.

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- Definition

Tabular disclosure of the major categories of postretirement benefit plan assets, and the fair value levels associated with each respective asset category.

+ References

No definition available.

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- Definition

Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans.

+ References

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- Definition

Tabular disclosure of the major categories of plan assets of defined benefit pension plans. This information includes the target allocation of plan assets, as well as the weighted average allocation of each category of assets as a percentage of total plan assets.

+ References

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- Definition

Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic 715

-SubTopic 20

-Publisher FASB

-Subparagraph (c)

-Name Accounting Standards Codification

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Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic 715

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Tabular disclosure of the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets of pension plans and/or other employee benefit plans for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Topic 715

-SubTopic 20

-Publisher FASB

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-Subparagraph (d)(4)

-Name Accounting Standards Codification

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

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