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Employee Benefit Plans (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Pension plans	Dec. 31, 2010 Pension plans	Dec. 31, 2011 Pension plans Global equity securities: Capital equipment	Dec. 31, 2010 Pension plans Global equity securities: Capital equipment	Dec. 31, 2011 Pension plans Global equity securities: Consumer goods	Dec. 31, 2010 Pension plans Global equity securities: Consumer goods	Dec. 31, 2011 Pension plans Global equity securities: Energy	Dec. 31, 2010 Pension plans Global equity securities: Energy	Dec. 31, 2011 Pension plans Global equity securities: Finance	Dec. 31, 2010 Pension plans Global equity securities: Finance	Dec. 31, 2011 Pension plans Global equity securities: Materials	Dec. 31, 2010 Pension plans Global equity securities: Materials	Dec. 31, 2011 Pension plans Global equity securities: Services	Dec. 31, 2010 Pension plans Global equity securities: Services	Dec. 31, 2011 Pension plans Global equity securities: Miscellaneous	Dec. 31, 2010 Pension plans Global equity securities: Miscellaneous	Dec. 31, 2011 Pension plans Global equity common trust funds	Dec. 31, 2010 Pension plans Global equity common trust funds	Dec. 31, 2011 Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2010 Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2011 Pension plans Debt securities: Non-U.S. Government securities	Dec. 31, 2010 Pension plans Debt securities: Non-U.S. Government securities	Dec. 31, 2011 Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2010 Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2011 Pension plans Other: Short term investments	Dec. 31, 2010 Pension plans Other: Short term investments	Dec. 31, 2011 Pension plans Other:	Dec. 31, 2010 Pension plans Other:	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Capital equipment	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Capital equipment	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Consumer goods	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Consumer goods	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Energy	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Energy	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Finance	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Finance	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Materials	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Materials	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Services	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Services	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Miscellaneous	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity securities: Miscellaneous	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity common trust funds	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Global equity common trust funds	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Other: Short term investments	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Other: Short term investments	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Other:	Dec. 31, 2010 Quoted Prices in Active Markets for Identical Assets (Level 1) Pension plans Other:	Dec. 31, 2011 Significant Observable Inputs (Level 2) Securities collateralized	Dec. 31, 2010 Significant Observable Inputs (Level 2) Securities collateralized	Dec. 31, 2011 Significant Observable Inputs (Level 2) Pension plans	Dec. 31, 2010 Significant Observable Inputs (Level 2) Pension plans	Dec. 31, 2011 Significant Observable Inputs (Level 2) Pension plans Global equity common trust funds	Dec. 31, 2010 Significant Observable Inputs (Level 2) Pension plans Global equity common trust funds	Dec. 31, 2011 Significant Observable Inputs (Level 2) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2010 Significant Observable Inputs (Level 2) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2011 Significant Observable Inputs (Level 2) Pension plans Debt securities: Non-U.S. Government securities	Dec. 31, 2010 Significant Observable Inputs (Level 2) Pension plans Debt securities: Non-U.S. Government securities	Dec. 31, 2011 Significant Observable Inputs (Level 2) Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2010 Significant Observable Inputs (Level 2) Pension plans Other:	Dec. 31, 2011 Significant Unobservable Inputs (Level 3)	Dec. 31, 2010 Significant Unobservable Inputs (Level 3)	Dec. 31, 2009 Significant Unobservable Inputs (Level 3)	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Debt securities: Fixed income common trust funds	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Debt securities: Fixed income common trust funds	Dec. 31, 2009 Significant Unobservable Inputs (Level 3) Debt securities: Fixed income common trust funds	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Alternative investments: Commingled global fund allocations	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Alternative investments: Commingled global fund allocations	Dec. 31, 2009 Significant Unobservable Inputs (Level 3) Alternative investments: Commingled global fund allocations	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Other:	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Other:	Dec. 31, 2009 Significant Unobservable Inputs (Level 3) Other:	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Pension plans	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Pension plans	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Pension plans Global equity common trust funds	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2009 Significant Unobservable Inputs (Level 3) Pension plans Debt securities: Fixed income common trust funds	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Pension plans Alternative investments: Commingled global fund allocations	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Pension plans Other:	Dec. 31, 2010 Significant Unobservable Inputs (Level 3) Pension plans Other:
Employee Benefit Plans
Fair value of plan assets		$ 1,115,200,000	$ 1,095,300,000	$ 27,100,000	$ 34,200,000	$ 16,500,000	$ 22,400,000	$ 12,300,000	$ 13,200,000	$ 10,100,000	$ 15,500,000	$ 17,200,000	$ 21,400,000	$ 12,700,000	$ 19,100,000	$ 39,400,000	$ 40,900,000	$ 328,900,000	$ 335,300,000	$ 331,900,000	$ 232,600,000	$ 36,000,000	$ 23,800,000	$ 231,900,000	$ 193,300,000	$ 43,500,000	$ 133,100,000	$ 7,700,000	$ 10,500,000	$ 432,800,000	$ 458,300,000	$ 27,100,000	$ 34,200,000	$ 16,500,000	$ 22,400,000	$ 12,300,000	$ 13,200,000	$ 10,100,000	$ 15,500,000	$ 17,200,000	$ 21,400,000	$ 12,700,000	$ 19,100,000	$ 39,400,000	$ 40,900,000	$ 91,600,000	$ 86,500,000	$ 64,000,000	$ 96,700,000	$ 70,900,000	$ 43,500,000	$ 133,100,000	$ 1,700,000	$ 1,100,000	$ 47,400,000	$ 48,600,000	$ 520,700,000	$ 505,100,000	$ 212,900,000	$ 248,800,000	$ 266,500,000	$ 231,300,000	$ 36,000,000	$ 23,800,000	$ 5,300,000	$ 1,200,000	$ 161,700,000	$ 131,900,000	$ 113,900,000	$ 1,400,000	$ 1,300,000	$ 1,200,000	$ 129,900,000	$ 122,400,000	$ 103,700,000	$ 6,000,000	$ 8,200,000	$ 9,000,000	$ 161,700,000	$ 131,900,000	$ 24,400,000	$ 1,400,000	$ 1,300,000	$ 1,200,000	$ 129,900,000	$ 122,400,000	$ 6,000,000	$ 8,200,000
Value of Short term investments (in dollars per unit)	$ 1.00

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Represents the per unit value of the investment.

+ References

No definition available.

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(iv)(b)(i)

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 49

-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 1

-Subparagraph (b)

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

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