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Vulnerability due to certain concentrations (Details)	Feb. 05, 2013
Vulnerability due to certain concentrations (Textual) [Abstract]
Approval date on the merger agreement by the Cymer Stockholders	Feb. 05, 2013

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- Definition

Merger agreement approval date.

+ References

No definition available.

+ Details

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Namespace Prefix:	asml_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	asml_VulnerabilityDueToCertainConcentrationsTextualAbstract
Namespace Prefix:	asml_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration