Loans Payable, Senior Notes, and Mortgage Company Loan Facility Senior Notes (Details Textual 3) - USD ($)	1 Months Ended	3 Months Ended					12 Months Ended
	Sep. 30, 2012	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Oct. 31, 2015	Jul. 31, 2015	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Jun. 12, 2017	Mar. 10, 2017	Oct. 30, 2015	Sep. 05, 2012	Apr. 13, 2009	Jun. 02, 2005
Senior Note Payable (Textual) [Abstract]
Percentage of Holding In Subsidiary		100.00%					100.00%
Issued Senior Notes		$ 2,462,463,000					$ 2,462,463,000	$ 2,694,372,000
Repayments of Senior Debt							$ 687,500,000		$ 300,000,000
0.5% Exchangeable Senior Notes Due 2032 [Member]
Senior Note Payable (Textual) [Abstract]
Interest rate on notes		0.50%					0.50%
Debt Instrument, Redemption Price, Percentage		100.00%
Debt Instrument, Repurchase Date		Sep. 15, 2017
Debt Instrument, Repurchase Amount		$ 287,500,000.000					$ 287,500,000.000
Debt Conversion, Convertible, number of shares issued per note exchanged	20.3749
PrincipalAmountDenomination													$ 1,000
Debt Instrument, Convertible, Conversion Price													$ 49.08
Additional common share if convertible debt exchanged		5,900,000
Issued Senior Notes		$ 0					$ 0	287,500,000
8.91% Senior Notes due 2017 [Member]
Senior Note Payable (Textual) [Abstract]
Interest rate on notes		8.91%					8.91%							8.91%
Issued Senior Notes		$ 0					$ 0	400,000,000
Repayments of Senior Debt		$ 400,000,000
4.875% Senior Notes Due 2027 [Member]
Senior Note Payable (Textual) [Abstract]
Interest rate on notes		4.875%					4.875%			4.875%	4.875%
Debt Instrument, Interest Rate, Effective Percentage										103.655%
Issued Senior Notes		$ 450,000,000					$ 450,000,000	0		$ 150,000,000	$ 300,000,000
Proceeds from Debt, Net of Issuance Costs			$ 156,400,000	$ 297,200,000
4.875% Senior Notes Due 2025 [Member]
Senior Note Payable (Textual) [Abstract]
Interest rate on notes		4.875%					4.875%					4.875%
Issued Senior Notes		$ 350,000,000					$ 350,000,000	350,000,000				$ 350,000,000
Proceeds from Debt, Net of Issuance Costs					$ 347,700,000
5.15% Senior Notes due 2015 [Member]
Senior Note Payable (Textual) [Abstract]
Interest rate on notes															5.15%
Repayments of Senior Debt						$ 300,000,000
Guarantor Subsidiaries [Member]
Senior Note Payable (Textual) [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent		100.00%					100.00%
Issued Senior Notes
Repayments of Senior Debt