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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENT (Tables)

12 Months Ended

Sep. 30, 2015

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENT

Summary of available-for-sale securities

		Cost			Gross Unrealized Gains			Gross Unrealized Losses			Estimated Fair Value
		(in thousands)
Equity Securities:
September 30, 2015		$	64,462		$	28,530		$	1,509		$	91,483
September 30, 2014		$	64,462		$	157,838		$	—		$	222,300

Summary of assets measured at fair value on a recurring basis

The following table summarizes our assets measured at fair value on a recurring basis presented in our Consolidated Balance Sheets as of September 30, 2015:

		Total Measured at Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
		(in thousands)
Short-term investments:
Certificate of deposit		$	2,101		$	—		$	2,101		$	—
Corporate debt securities			27,139			—			27,139			—
U.S. government and federal agency securities			16,303			4,823			11,480			—

Total short-term investments			45,543			4,823			40,720			—
Cash and cash equivalents			717,977			717,977			—			—
Investments			91,483			91,483			—			—
Other current assets			38,095			37,845			250			—
Other assets			2,000			2,000			—			—

Total assets measured at fair value		$	895,098		$	854,128		$	40,970		$	—

Summary of supplemental fair value information about long-term fixed-rate debt

		September 30,
		2015			2014 (as adjusted)
		(in millions)
Carrying value of long-term fixed-rate debt		$	531.5		$	79.1
Fair value of long-term fixed-rate debt		$	553.5		$	84.3