Loans Payable, Senior Notes and Mortgage Company Loan Facility Credit Facility (Details Textual 2) - USD ($)	3 Months Ended	6 Months Ended	9 Months Ended
	Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2016	May. 19, 2016	Oct. 31, 2015	Aug. 01, 2013
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,470,946,000
Long-term Line of Credit		$ 1,150,436,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 1,035,000,000
Line of Credit Facility, term of contract		5 years
Line of Credit Facility, Expiration Date		Aug. 01, 2018
Maximum Permissible Leverage Ratio		175.00%
Minimum Net Worth Required for Compliance		$ 2,490,000,000
Existing Leverage Ratio		.7437
Tangible Net Worth		$ 4,130,000,000
Ability to repurchase common stock		1,870,000,000
Long-term Line of Credit		100,000,000			$ 350,000,000
Letters of Credit Outstanding, Amount		$ 94,800,000
Debt Instrument, Interest Rate at Period End		1.94%
May 2016 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Existing Leverage Ratio		.7352
Tangible Net Worth		$ 4,130,000,000
Ability to repurchase common stock		$ 2,200,000,000
Guarantor Subsidiaries [Member]
Line of Credit Facility [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		100.00%
Subsequent Event [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Proceeds from Lines of Credit	$ 450,000,000
Subsequent Event [Member] | May 2016 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,215,000,000
Line of Credit Facility, term of contract			5 years
Maximum Permissible Leverage Ratio			175.00%
Minimum Net Worth Required for Compliance	$ 2,650,000,000		$ 2,650,000,000