Commitments and Contingent Liabilities (Litigation) (Narrative) (Details) (USD $) In Millions, unless otherwise specified		1 Months Ended	12 Months Ended			3 Months Ended
	Sep. 30, 2012 PFOA Matters [Member]	Jul. 31, 2005 PFOA Matters: Drinking Water Actions [Member]	Dec. 31, 2004 PFOA Matters: Drinking Water Actions [Member] resident	Sep. 30, 2012 PFOA Matters: Drinking Water Actions [Member]	Jan. 31, 2012 PFOA Matters: Drinking Water Actions [Member]	Sep. 30, 2012 Monsanto Patent Dispute [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, at carrying value	$ 16
Binding settlement agreement, class size			80,000
Plaintiffs attorney fees		23
Community health project		70
Health studies cost, estimated				33
Escrow deposit					1
Loss contingency, potential additional loss				235
Jury awarded damages						$ 1,000