LONG-TERM DEBT (Convertible Notes) (Details) (USD $)	12 Months Ended											12 Months Ended	1 Months Ended		12 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended			12 Months Ended					12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013 7.875% convertible notes due 2026 [Member]		Sep. 30, 2012 7.875% convertible notes due 2026 [Member]		Sep. 30, 2013 4.625 Percent Convertible Notes Due 2026 [Member]		Sep. 30, 2013 4.0 Percent Convertible Notes Due 2027 [Member]		Sep. 30, 2013 Convertible Notes [Member] D	Dec. 31, 2012 Convertible Notes [Member] 7.875% convertible notes due 2026 [Member]	Sep. 30, 2013 Convertible Notes [Member] 7.875% convertible notes due 2026 [Member]	Sep. 30, 2011 Convertible Notes [Member] Adoption Of Guidance For Debt With Conversion and Other Options [Member]	Dec. 31, 2012 Convertible Notes [Member] 4.625 Percent Convertible Notes Due 2026 [Member]	Sep. 30, 2013 Convertible Notes [Member] 4.625 Percent Convertible Notes Due 2026 [Member]	Sep. 30, 2012 Convertible Notes [Member] 4.625 Percent Convertible Notes Due 2026 [Member]		Sep. 30, 2013 Convertible Notes [Member] 4.0 Percent Convertible Notes Due 2027 [Member]	Sep. 30, 2012 Convertible Notes [Member] 4.0 Percent Convertible Notes Due 2027 [Member]		Sep. 30, 2013 Convertible Notes [Member] 0.625 Percent Convertible Notes Due 2026 [Member]	Sep. 30, 2013 Convertible Notes [Member] Convertible Notes 2006 Member]	Sep. 30, 2013 Convertible Notes [Member] Convertible Notes 2007 [Member]	Sep. 30, 2013 Convertible Debt [Member]	Sep. 30, 2012 Convertible Debt [Member]	Sep. 30, 2013 Convertible Debt [Member] Convertible Notes 2006 Member]	Sep. 30, 2013 Convertible Debt [Member] Convertible Notes 2007 [Member]	Sep. 30, 2013 Convertible Debt [Member] Convertible Notes 2013 [Member]	Sep. 30, 2013 Triggering Event One [Member] Convertible Notes [Member] D	Sep. 30, 2013 Triggering Event One [Member] Convertible Notes [Member] Convertible Notes 2013 [Member] D	Sep. 30, 2013 Triggering Event Two [Member] Convertible Notes [Member] Convertible Notes 2013 [Member] D
Debt Instrument [Line Items]
Debt instrument, face amount													$ 250,000,000
Initial principal amount per note													900
Face principal amount per note													1,000
Debt Instrument, Convertible, Effective Interest Rate													10.90%															7.00%	7.70%	5.50%
Proceeds from Convertible Debt													220,000,000
Equivalent Shares Of Common Stock Per 1000 Principal Amount Of Convertible Notes													83.3333											47.6667	37.4111
Debt Instrument, Convertible, Conversion Price													$ 12.00											$ 20.98	$ 26.73
Total amortization period for debt discount (in years):																												10 years	12 years	8 years
Remaining amortization period for debt discount (in years):																												3 years	6 years	7 years
Maximum Number Of Shares Of Common Stock Convertible Notes Are Convertible Into													19,208,404											3,000,000	7,000,000
Debt Instrument, Convertible, Threshold Trading Days												20																			5	20	5
Debt Instrument, Convertible, Threshold Consecutive Trading Days												30 days																			5 days	30 days	5 days
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger												120.00%																			97.00%	120.00%	97.00%
Repurchased amount of debt																245,000,000
Long-term debt	1,138,000,000	1,060,000,000		227,000,000	[1]	0	[1]	55,000,000	[1]	200,000,000	[1]					300,000,000		300,000,000	[1]		200,000,000	[1]
Stated interest rate				7.875%				4.625%		4.00%							4.625%			4.00%
Convertible note repurchase price																236,000,000
Loss on debt extinguishment	24,000,000	0	0													5,000,000
Fair value of debt component													216,000,000
Fair value of equity component													9,000,000
Recognition Of Estimated Equity Component Ofconvertible Notes Before Tax															108,000,000
Allocation Of Unamortized Debt Issuance Costs To Equity Component Reduction Of Paid In Capital															4,000,000
Recognition Of Discount On Convertible Notes															108,000,000
Deferred Tax Liabilities Conversion Of Equity Component Of Convertible Notes															39,000,000
Convertible Notes Redemption Option Price																	100.00%			100.00%
Convertible Notes Repurchase Option Price																				100.00%			100.00%
Debt Instrument, Convertible, Carrying Amount of Equity Component		67,000,000																								73,000,000	67,000,000
Unamortized discount on convertible notes	$ 66,000,000	$ 58,000,000		$ 23,000,000								$ 43,000,000		$ 23,000,000

[1] The 4.625 percent, 4.0 percent and 7.875 percent convertible notes contain a put and call feature, which allows for earlier redemption beginning in 2016, 2019 and 2020, respectively.