Business Combinations (Schedule of Unaudited Pro Forma Total Revenue and Net Income (Loss) (Details) (Vovici and GMT, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 31, 2011	Jul. 31, 2011
Vovici and GMT
Business Acquisition [Line Items]
Total revenue	$ 381,858	$ 725,331
Net loss attributable to Comverse Technology Inc.	$ (41,979)	$ (104,092)

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=6909870&loc=d3e1392-128463

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration