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Subsequent Events (Details) | Feb. 05, 2013 | Oct. 16, 2012
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Subsequent Events (Textual) [Abstract] |  |
Approval date on the merger agreement by the Cymer Stockholders | Feb. 05, 2013 |
Date of the Cymer Agreement |  | Oct. 16, 2012

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- Definition Date on merger agreement. + References No definition available. + Details
Name: | asml_DateOnMergerAgreement
Namespace Prefix: | asml_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | instant

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- Definition Merger agreement approval date. + References No definition available. + Details
Name: | asml_MergerAgreementApprovalDate
Namespace Prefix: | asml_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | asml_SubsequentEventsTextualAbstract
Namespace Prefix: | asml_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration