CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)	Sep. 30, 2012
Debt instrument stated percentage	4.00%
5.625% Senior Notes Due 2019 [Member]
Debt instrument stated percentage	5.625%
5.75% Senior Notes Due 2020 [Member]
Debt instrument stated percentage	5.75%
8.0% Senior Notes [Member]
Debt instrument stated percentage	8.00%
8.25% Senior Notes [Member]
Debt instrument stated percentage	8.25%
1.875% Convertible Senior Notes [Member]
Debt instrument stated percentage	1.875%