SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Accounting Policies [Abstract]
Foreign exchange gain (loss)	$ 1.5	$ (0.9)	$ (0.1)
Unbilled receivable	8.6	1.1
Allowance for doubtful accounts	0	0
Inventory, net of reserves for excess and obsolete inventory	2.6	2.5
Interest capitalized	32.9	8.2	3.9
Deferred drydocking, period costs are charged to expense	30 months
Deferred drydocking	3.2	2.2
Deferred fees	22.7	9.6
Deferred costs	$ 24.4	$ 2.8