Pensions and Postretirement Benefits (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in Plan Assets
Fair value of plan assets at beginning of year	$ 3,375.9	$ 0
Gross benefits paid	(31.0)	(30.4)
Fair value of plan assets at end of year	3,488.4	3,375.9
Amounts Recognized in the Balance Sheet Consist of:
Accumulated other comprehensive income (loss) before tax	1,675.7	1,326.6	1,392.5
U.S. Plans [Member]
Change in Plan Assets
Fair value of plan assets at beginning of year	2,574.9	2,070.1
Actual return on plan assets	213.7	290.1
Settlements	(1.3)
Company contributions	44.0	403.8
Gross benefits paid	(190.0)	(189.1)
Fair value of plan assets at end of year	2,641.3	2,574.9
Funded Status (Underfunded)	(724.7)	(516.5)
Amounts Recognized in the Balance Sheet Consist of:
Accrued expenses current liability	(14.1)	(14.2)
Pension obligation non-current liability	(710.6)	(502.3)
Net asset (liability) recognized	(724.7)	(516.5)
Accumulated other comprehensive income (loss) before tax	(1,349.0)	(1,178.7)
U.K. Plans [Member]
Change in Plan Assets
Fair value of plan assets at beginning of year	702.4	633.5
Actual return on plan assets	22.6	73.4
Participant contributions	0.3	0.3
Company contributions	34.4	32.8
Foreign currency translation	(2.8)	(21.5)
Gross benefits paid	(14.3)	(16.1)
Fair value of plan assets at end of year	742.6	702.4
Funded Status (Underfunded)	(111.9)	(3.0)
Amounts Recognized in the Balance Sheet Consist of:
Pension obligation non-current liability	(111.9)	(3.0)
Net asset (liability) recognized	(111.9)	(3.0)
Accumulated other comprehensive income (loss) before tax	(227.4)	(81.2)
Other Plans [Member]
Change in Plan Assets
Fair value of plan assets at beginning of year	98.6	80.5
Actual return on plan assets	(2.9)	9.0
Settlements	(0.8)
Participant contributions	2.4	2.5
Company contributions	13.0	7.5
Foreign currency translation	(2.1)	3.6
Other	0.3
Gross benefits paid	(4.0)	(4.5)
Fair value of plan assets at end of year	104.5	98.6
Funded Status (Underfunded)	(82.4)	(51.2)
Amounts Recognized in the Balance Sheet Consist of:
Prepaid pension	0.4	0.7
Accrued expenses current liability	(1.0)	(0.5)
Pension obligation non-current liability	(81.8)	(51.4)
Net asset (liability) recognized	(82.4)	(51.2)
Accumulated other comprehensive income (loss) before tax	$ (79.0)	$ (44.7)

Defined benefit plan other changes plan assets.

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The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The amount that relates to an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts.

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-Paragraph 5

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2417-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6410544&loc=d3e1703-114919

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

+ Details

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- Definition

Cumulative employer's contributions in excess of net pension cost recognized, before the adoption of the recognition provisions of FAS 158. Under FAS 158, prepaid pension costs are no longer recognized in the statement of financial position. Note that there is a separate concept for noncurrent assets relating to defined benefit pension and other defined benefit postretirement plans for use under the recognition provisions of FAS 158.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph c(4)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6410544&loc=d3e1703-114919

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Balance Type:	debit
Period Type:	instant