Basis of Presentation (Details)	Mar. 31, 2013 item
Basis of Presentation
Number of wholly owned subsidiaries	2

Represents the number of wholly owned subsidiaries of the entity.

No definition available.

Name:	rsl_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix:	rsl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant