Subsequent Event Subsequent Event (Details textual) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified		3 Months Ended
	Oct. 16, 2013 Agreement	Jan. 31, 2014 Scenario, Forecast [Member]	Jan. 31, 2014 Scenario, Forecast [Member] Boral Business [Member]	Jan. 31, 2014 Scenario, Forecast [Member] Boral [Member]
Schedule of Equity Method Investments [Line Items]
Number of share sale and subscription agreements	2
Equity Method Investment, Ownership Percentage			50.00%
Equity Method Investment, Ownership Percentage by Joint Venture Partner				50.00%
Payments to Acquire Equity Method Investments		$ 500
Equity Method Investment, Contingent Consideration Arragements, Range of Outcomes, Value, High		75
Payments to Acquire Equity Method Investments, Cash on Hand		150
Payments to Acquire Equity Method Investments, Long Term Debt		350
Contingent Bridge Loan Facility, Maximum Borrowing Capacity	$ 350