SHAREHOLDERS' EQUITY (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Increase (Decrease) in Shareholders' Equity
Balance	$ 3,717,398	$ 3,929,830
Balance (in shares)	303,861,272
Repurchase of equity component of 5.375% Convertible Notes		(2,862)
Common shares issued under share-based compensation plans	2,677	5,099
Repurchase of common shares	(35,005)	(108,724)
Share-based compensation	9,095	19,152
Employee withholding taxes related to share-based awards	(6,848)	(3,824)
Tax benefits from stock options exercised	4,604	593
Total before comprehensive income (loss)	3,691,921	3,839,264
Net loss	(27,530)	(12,921)
Other comprehensive income (loss)	(77,403)	194,275
Total comprehensive loss	(104,933)	181,354
Balance	3,586,988	4,020,618
Balance (in shares)	303,801,803
Common Shares
Increase (Decrease) in Shareholders' Equity
Balance	5,940,652	5,963,621
Balance (in shares)	303,861,000	306,371,000
Common shares issued under share-based compensation plans	11,664	12,181
Common shares issued under share-based compensation plans (in shares)	441,000	518,000
Repurchase of common shares	(9,780)	(39,027)
Repurchase of common shares (in shares)	(500,000)	(2,005,000)
Total before comprehensive income (loss)	5,942,536	5,936,775
Total before comprehensive income (loss) (in shares)	303,802,000	304,884,000
Balance	5,942,536	5,936,775
Balance (in shares)	303,802,000	304,884,000
Additional Paid-In Capital
Increase (Decrease) in Shareholders' Equity
Balance	267,118	276,117
Repurchase of equity component of 5.375% Convertible Notes		(180)
Common shares issued under share-based compensation plans	(8,987)	(7,082)
Share-based compensation	9,095	19,152
Employee withholding taxes related to share-based awards	(6,848)	(3,824)
Tax benefits from stock options exercised	4,604	593
Total before comprehensive income (loss)	264,982	284,776
Balance	264,982	284,776
Accumulated Deficit
Increase (Decrease) in Shareholders' Equity
Balance	(2,370,976)	(2,030,292)
Repurchase of equity component of 5.375% Convertible Notes		(2,682)
Repurchase of common shares	(25,225)	(69,697)
Total before comprehensive income (loss)	(2,396,201)	(2,102,671)
Net loss	(27,530)	(12,921)
Balance	(2,423,731)	(2,115,592)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Shareholders' Equity
Balance	(119,396)	(279,616)
Total before comprehensive income (loss)	(119,396)	(279,616)
Other comprehensive income (loss)	(77,403)	194,275
Balance	$ (196,799)	$ (85,341)