Commitments and Contingent Liabilities (PFOA Matters) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2005	Dec. 31, 2004	Sep. 30, 2011
PFOA Matters [Member]
Binding settlement agreement, class size		80,000
Plaintiffs attorney fees	$ 23
Community health project	70
Health studies cost, estimated			33
Loss contingency, potential additional loss			235
Loss contingency accrual, at carrying value			21.0
Civil Actions [Member]
Loss contingency accrual, at carrying value			$ 8.3