Commitments and Contingent Liabilities (Litigation) (Narrative) (Details) (USD $) In Millions, unless otherwise specified		1 Months Ended	3 Months Ended	12 Months Ended		12 Months Ended			3 Months Ended
	Mar. 31, 2013 PFOA Matters [Member]	Jul. 31, 2005 PFOA Matters: Drinking Water Actions [Member]	Mar. 31, 2013 PFOA Matters: Drinking Water Actions [Member]	Dec. 31, 2004 PFOA Matters: Drinking Water Actions [Member] resident	Jan. 31, 2012 PFOA Matters: Drinking Water Actions [Member]	Dec. 31, 2012 Monsanto Patent Dispute [Member]	Mar. 31, 2013 Monsanto Fixed Royalty Payments 2014 - 2017 [Member]	Mar. 31, 2013 Monsanto per Unit Royalty Payments 2018 - 2023 [Member]	Mar. 31, 2013 Titanium Dioxide Antitrust Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, at carrying value	$ 15
Binding settlement agreement, class size				80,000
Plaintiffs attorney fees		23
Community health project		70
Escrow deposit					1
Loss contingency, potential additional loss			235
Lawsuits alleging personal injury			42
Lawsuits alleging wrongful death			2
Increase in lawsuits alleging personal injury			17
Increase in lawsuits alleging wrongful death			1
Jury awarded damages						1,000
Payments under license agreements							$ 802	$ 950
Lawsuits alleging antitrust violations									2