Long-Term Debt (Details) (USD $) In Thousands	Jul. 31, 2011	Oct. 31, 2010
Summary of Long-term debt
Long-term debt, Total	$ 1,268,323	$ 965,589
Current portion of long-term debt	12,500	12,523
Long-term debt	1,255,823	953,066
Credit Agreement [Member]
Summary of Long-term debt
Long-term debt, Total	284,251	273,700
Current portion of long-term debt	(12,500)
Long-term debt	271,800
Senior Notes due 2017 [Member]
Summary of Long-term debt
Long-term debt, Total	302,989	303,396
Senior Notes due 2019 [Member]
Summary of Long-term debt
Long-term debt, Total	242,771	242,306
Senior Notes due 2021 [Member]
Summary of Long-term debt
Long-term debt, Total	290,220
United states trade accounts receivable credit facility [Member]
Summary of Long-term debt
Long-term debt, Total	125,000	135,000
Other long-term debt [Member]
Summary of Long-term debt
Long-term debt, Total	$ 23,092	$ 11,187