Business And Summary Of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Apr. 30, 2013	Apr. 30, 2012	Jan. 31, 2013
Accounting Policies [Abstract]
Accounts receivable sold	$ 213.0		$ 284.7
Discount fees on sale of accounts receivable	$ 0.6	$ 0.5

Accounts Receivable Sold to and Held by Financial Institutions

No definition available.

Name:	tecd_AccountsReceivableSoldToandHeldbyFinancialInstitutions
Namespace Prefix:	tecd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant