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Acquisitions (Purchase Price Allocation)(Details) (USD $)
Jan. 31, 2015
Jan. 31, 2014
Nov. 01, 2012
Nov. 01, 2013
Business Acquisition [Line Items]        
Goodwill $ 198,565,000us-gaap_Goodwill $ 230,472,000us-gaap_Goodwill    
SDG        
Business Acquisition [Line Items]        
Cash     65,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Accounts receivable     260,800,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Inventories     126,100,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Tangible assets (includes property and equipment, deferred tax assets and other assets)     6,200,000tecd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Goodwill     122,600,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Identifiable intangible assets     134,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Accounts payable     (265,200,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Liabilities (includes accrued expenses, deferred tax liability and other liabilities)     (91,800,000)tecd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
Purchase price of acquired entity     358,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= tecd_SdgMember
 
TDMobility [Member]        
Business Acquisition [Line Items]        
Business Acquisition, Purchase Price Allocation, Liabilities Assumed       6,700,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= tecd_TDMobilityMember
Tangible assets (includes property and equipment, deferred tax assets and other assets)       4,000,000tecd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= tecd_TDMobilityMember
Goodwill       2,500,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= tecd_TDMobilityMember
Identifiable intangible assets       $ 4,200,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= tecd_TDMobilityMember