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RELATED PARTY TRANSACTIONS (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Director that serves as counsel |  |
Related party transactions |  |
Expenses incurred in connection with materials or services provided by a related party | $ 0.6 | $ 1.2
Directors and Officers that provide promotional materials |  |
Related party transactions |  |
Expenses incurred in connection with materials or services provided by a related party | $ 0.1 | $ 0.2
Number of directors and officers who are principal owners of a company that provides promotional materials | 2 |

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- Definition Represents the number of directors and officers of the entity that are principal owners of a separate company that provides promotional materials to the entity. + References No definition available. + Details
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Namespace Prefix: | mnst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Expenses recognized during the period resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 57 -Paragraph 2 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration