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Summary of Significant Accounting Policies - Property Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Building [Member] Y | Dec. 31, 2012 Machinery and Equipment [Member] Y | Dec. 31, 2012 Software [Member] Y
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property, Plant and Equipment, Useful Life, Minimum |  |  | 20 | 3 | 3
Property, Plant and Equipment, Useful Life, Maximum |  |  | 30 | 10 | 7
Unamortized software development costs | $ 407,032 | $ 381,700 |  |  |

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- Definition Unamortized software development costs + References No definition available. + Details
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Namespace Prefix: | arw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration