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Financial Risk Management - Percentage of accounts receivable (Details)	Dec. 31, 2019	Dec. 31, 2018
Customer A and Its Affiliates [Member]
IFRS Statement [Line Items]
Percentage Of Accounts Receivable	37.70%	33.50%
Customer B and Its Affiliates [Member]
IFRS Statement [Line Items]
Percentage Of Accounts Receivable	7.90%	12.90%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	himx_
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Period Type:	duration

X

- Definition

It represents to Percentage of trade accounts receivable

+ References

No definition available.

+ Details

Name:	himx_PercentageOfAccountsReceivables
Namespace Prefix:	himx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_MajorCustomersAxis=himx_CustomerAAndItsAffiliatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MajorCustomersAxis=himx_CustomerBAndItsAffiliatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: