Condensed Consolidated Statements Of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified	9 Months Ended
Oct. 31, 2012
Payments of capital contributions for Share Disribution	$ 38.5

Payments Related to Capital Contributions for Share Disribution

No definition available.

Name:	cmvt_PaymentsRelatedToCapitalContributionsForShareDisribution
Namespace Prefix:	cmvt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration