Basis of Presentation (Details) (Segmenta, USD $) In Millions, unless otherwise specified	0 Months Ended
May 31, 2013
Segmenta
Acquisitions
Deferred consideration	$ 7.1

Cash outflow representing an adjustment to the purchase price of a previous acquisition.

No definition available.

Name:	us-gaap_PaymentsForPreviousAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration