INVESTMENTS IN VARIABLE INTEREST ENTITIES - SCHEDULE OF VIEs (DETAILS) (USD $) In Millions	Sep. 30, 2011
Investment Holdings [Line Items]
Total amortized cost	$ 469.7
Total fair value	453.5
Amortized Cost [Member]
Investment Holdings [Line Items]
Due in one year or less	5.8
Due after one year through five years	240.0
Due after five years through ten years	223.9
Total amortized cost	469.7
Estimated Fair Value [Member]
Investment Holdings [Line Items]
Due in one year or less	5.8
Due after one year through five years	231.2
Due after five years through ten years	216.5
Total fair value	$ 453.5