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Derivatives And Risk Management - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Derivative [Line Items]
Forecasted purchases to manage fluctuations	65.00%
Existing gains or losses expected to be reclassified into earnings within the next twelve months	$ 5.4

X

- Definition

Maximum percentage of cash flow hedge coverage as defined by policy

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

X

- Definition

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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