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PENSIONS - Asset Allocation (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Marine Scheme
Pensions:
Target allocation	100.00%
Actual allocation	100.00%	100.00%
Marine Scheme | Equity
Pensions:
Target allocation, minimum	30.00%
Target allocation, maximum	65.00%
Marine Scheme | Bonds
Pensions:
Target allocation, minimum	10.00%
Target allocation, maximum	50.00%
Marine Scheme | Other
Pensions:
Target allocation, minimum	20.00%
Target allocation, maximum	40.00%
Marine Scheme | Minimum | Equity
Pensions:
Actual allocation	30.00%	30.00%
Marine Scheme | Minimum | Bonds
Pensions:
Actual allocation	10.00%	10.00%
Marine Scheme | Minimum | Other
Pensions:
Actual allocation	20.00%	20.00%
Marine Scheme | Maximum | Equity
Pensions:
Actual allocation	65.00%	65.00%
Marine Scheme | Maximum | Bonds
Pensions:
Actual allocation	50.00%	50.00%
Marine Scheme | Maximum | Other
Pensions:
Actual allocation	40.00%	40.00%
UK Scheme
Pensions:
Target allocation	100.00%
Actual allocation	100.00%	100.00%
UK Scheme | Equity
Pensions:
Target allocation	70.00%
Actual allocation	72.50%	73.00%
UK Scheme | Bonds
Pensions:
Target allocation	30.00%
Actual allocation	22.50%	23.00%
UK Scheme | Cash
Pensions:
Target allocation	0.00%
Actual allocation	5.00%	5.00%

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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-Publisher FASB

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

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-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920



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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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-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.

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