Employee Benefit Plans (Asset Allocation) (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Asset Category
Target allocation, near-term benefit payments	32.00%
Target allocation, long-term growth	68.00%
Target allocation, equity securities	40.00%
Target allocation, fixed income securities	30.00%
Target allocation, alternative investments	30.00%
U.S. Based Pension Benefit Plans [Member]
Asset Category
Domestic fixed income securities	21.00%	22.00%
Other investments	29.00%	36.00%
Total	100.00%	100.00%
Target allocation, near-term benefit payments	20.00%
Target allocation, long-term growth	80.00%
Target allocation, fixed income securities	20.00%
Target allocation, alternative investments	25.00%
Average return on asset mix	7.85%
Defined Benefit Plan, Assumptions Used in Investment Strategy, Expected Return	7.75%
Weighted average expected long-term rate of return on plan assets	8.00%	8.00%	8.00%
Non-U.S. Pension Benefit Plans [Member]
Asset Category
Equity Securities	40.00%	41.00%
Domestic fixed income securities	36.00%	34.00%
Other investments	24.00%	25.00%
Total	100.00%	100.00%
Average return on asset mix	7.50%
U.K. Pension Plans, Defined Benefit [Member]
Asset Category
Weighted average expected long-term rate of return on plan assets	7.00%
Large and Small Cap Domestic [Member] \| U.S. Based Pension Benefit Plans [Member]
Asset Category
Equity Securities	37.00%	28.00%
Target allocation, equity securities	40.00%
International Securities [Member] \| U.S. Based Pension Benefit Plans [Member]
Asset Category
Equity Securities	13.00%	14.00%
Target allocation, equity securities	15.00%

Defined Benefit Plan, Assumptions Used in Investment Strategy, Expected Return

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Defined Benefit Plan, Historical Average Return on Asset Mix

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Defined Benefit Plan, Target Allocation Percentage of Assets, Long-term Growth

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Defined Benefit Plan, Target Allocation Percentage of Assets, Near-term Benefit Payments

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Expected Long-Term Rate of Return on Plan Assets

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-Topic 715

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- Definition

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

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

+ References

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

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

+ References

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

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-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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

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Target allocation percentage in other than debt securities, equity securities, and real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ References

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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

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