EQUITY (Details 3) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended			2 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Feb. 28, 2013	Jan. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
Changes in Shareholders' Equity
Balances			$ 1,218		$ 1,218	$ 1,492
Net income (loss)					(83)	67
Distributions paid to noncontrolling interests					(6)	(3)
Purchase of businesses or joint venture interests					3
Contributions from noncontrolling interests					0	2
Other comprehensive income					0	3
Preferred stock dividends					0	(6)
Repurchases of common stock					(100)	(26)
Repurchases of common stock (in shares)	(1,010,000)	(914,000)	(531,000)	(3,406,000)			(5,860,730)
Stock-based compensation expense and issuance of common stock					14	2
Balances	1,046			1,218	1,046	1,531	1,046
Preferred Stock
Changes in Shareholders' Equity
Balances			0		0	334
Balances (in shares)			0		0	345,000,000
Net income (loss)					0	0
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Purchase of businesses or joint venture interests (in shares)					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	0
Preferred stock dividends					0	0
Repurchases of common stock					0	0
Repurchases of common stock (in shares)					0	0
Stock-based compensation expense and issuance of common stock					0	0
Stock-based compensation expense and issuance of common stock (in shares)					0	0
Balances	0				0	334	0
Balances (in shares)	0				0	345,000,000	0
Common Stock
Changes in Shareholders' Equity
Balances			7		7	7
Balances (in shares)			104,633,000		104,633,000	103,756,000
Net income (loss)					0	0
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Purchase of businesses or joint venture interests (in shares)					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	0
Preferred stock dividends					0	0
Repurchases of common stock					0	0
Repurchases of common stock (in shares)					(2,455,000)	(1,327,000)
Stock-based compensation expense and issuance of common stock					0	0
Stock-based compensation expense and issuance of common stock (in shares)					1,248,000	954,000
Balances	7				7	7	7
Balances (in shares)	10,426,000				10,426,000	103,383,000	10,426,000
Additional Paid-in Capital
Changes in Shareholders' Equity
Balances			4,471		4,471	4,427
Net income (loss)					0	0
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	0
Preferred stock dividends					0	(6)
Repurchases of common stock					0	0
Stock-based compensation expense and issuance of common stock					13	2
Balances	4,484				4,484	4,423	4,484
Accumulated Other Comprehensive Loss
Changes in Shareholders' Equity
Balances			(68)		(68)	(52)
Net income (loss)					0	0
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	3
Preferred stock dividends					0	0
Repurchases of common stock					0	0
Stock-based compensation expense and issuance of common stock					0	0
Balances	(68)				(68)	(49)	(68)
Accumulated Deficit
Changes in Shareholders' Equity
Balances			(1,288)		(1,288)	(1,440)
Net income (loss)					(88)	64
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	0
Preferred stock dividends					0	0
Repurchases of common stock					0	0
Stock-based compensation expense and issuance of common stock					0	0
Balances	(1,376)				(1,376)	(1,376)	(1,376)
Treasury Stock
Changes in Shareholders' Equity
Balances			(1,979)		(1,979)	(1,853)
Net income (loss)					0	0
Distributions paid to noncontrolling interests					0	0
Purchase of businesses or joint venture interests					0
Contributions from noncontrolling interests					0	0
Other comprehensive income					0	0
Preferred stock dividends					0	0
Repurchases of common stock					(100)	(26)
Stock-based compensation expense and issuance of common stock					1	0
Balances	(2,078)				(2,078)	(1,879)	(2,078)
Noncontrolling Interests
Changes in Shareholders' Equity
Balances			75		75	69
Net income (loss)					5	3
Distributions paid to noncontrolling interests					(6)	(3)
Purchase of businesses or joint venture interests					3
Contributions from noncontrolling interests					0	2
Other comprehensive income					0	0
Preferred stock dividends					0	0
Repurchases of common stock					0	0
Stock-based compensation expense and issuance of common stock					0	0
Balances	$ 77				$ 77	$ 71	$ 77