Commitments and Contingencies (Put Option Agreements) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Jul. 03, 2012	Sep. 30, 2012
San Fu Gas [Member]
Put Option [Line Items]
Percentage of ownership		74.00%
Put option effective date maximum		January 2015
Estimated current value of put option		290
Indura [Member]
Put Option [Line Items]
Agreement to purchase additional shares under put option	16.3
Put option exercise period start date		1 July 2015
Put option exercise period beginning 1 July 2015	2 years