Commitments and Contingent Liabilities (PFOA Matters) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended			12 Months Ended
	Jul. 31, 2005 PFOA Matters [Member]	Dec. 31, 2004 PFOA Matters [Member]	Jun. 30, 2011 PFOA Matters [Member]	Jun. 30, 2011 Civil Actions [Member]	Dec. 31, 2005 Environmental Matters [Member]	Jun. 30, 2011 Environmental Matters [Member]
Settlement agreement, accrual amount		$ 108
Binding settlement agreement, class size		80,000
Plaintiffs attorney fees	23
Community health project	70
Health studies cost, estimated			32
Loss contingency, potential additional loss			235
Preliminary settlement agreement				8.3
Loss contingency accrual, at carrying value			21.0			9.0
Civil fines paid					$ 10.25