Employee Benefit Plans (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Domestic Pension Plans
Actual Allocations
Global equities (as a percent)	16.00%	19.00%
Global equity common trust funds (as a percent)	27.00%	26.00%
Fixed income common trust funds (as a percent)	27.00%	17.00%
Commingled global fund allocations (as a percent)	25.00%	22.00%
Short term investments (as a percent)	4.00%	15.00%
Other (as a percent)	1.00%	1.00%
Total (as a percent)	100.00%	100.00%
Mid-point of Target Allocation Range
Global equities (as a percent)	17.00%
Global equity common trust funds (as a percent)	33.00%
Fixed income common trust funds (as a percent)	20.00%
Commingled global fund allocations (as a percent)	30.00%
Total (as a percent)	100.00%
Foreign Pension Plans
Actual Allocations
Global equity common trust funds (as a percent)	38.00%	50.00%
Fixed income common trust funds (as a percent)	40.00%	36.00%
Non-U.S. Government securities (as a percent)	15.00%	10.00%
Short term investments (as a percent)	5.00%	3.00%
Other (as a percent)	2.00%	1.00%
Total (as a percent)	100.00%	100.00%
Mid-point of Target Allocation Range
Global equity common trust funds (as a percent)	44.00%
Fixed income common trust funds (as a percent)	34.00%
Non-U.S. Government securities (as a percent)	20.00%
Short term investments (as a percent)	1.00%
Other (as a percent)	1.00%
Total (as a percent)	100.00%

Represents the percentage of total target assets under the defined benefit plan.

No definition available.

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- Definition

Target allocation percentage of investments in commingled global fund allocations to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of investments in global equity common trust funds to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of investments in fixed income common trust funds to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of investments in global equity securities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of short term investments in common trust funds or interest bearing accounts to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of commingled global fund allocations to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of global equity common trust funds to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of fixed income common trust funds to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of foreign government securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of global equity securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of other investments in insurance contracts, private equity and publicly traded real estate trusts to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of short term investments in common trust funds or interest bearing accounts to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of investments in foreign government securities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

Target allocation percentage of other investments in insurance contracts, private equity and publicly traded real estate trusts to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ References

No definition available.

+ Details

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- Definition

The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(1)

-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 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e2446-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

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

+ Details

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