SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Foreign exchange) (Details) (Contract Drilling Costs [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Contract Drilling Costs [Member]
Schedule of Foreign Currency Transactions [Line Items]
Foreign exchange gain (loss)	$ (2.8)	$ 1.5	$ (0.9)