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Commitments and Contingent Liabilities (Litigation) (Narrative) (Details) (USD $) In Millions, unless otherwise specified |  | 12 Months Ended |  | 3 Months Ended | 1 Months Ended |
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Mar. 31, 2014 PFOA Matters [Member] | Dec. 31, 2004 PFOA Matters: Drinking Water Actions [Member] resident | Jan. 31, 2012 PFOA Matters: Drinking Water Actions [Member] | Mar. 31, 2014 PFOA Matters: Additional Actions - Ohio MDL [Member] | Mar. 30, 2014 PFOA Matters: Additional Actions - West Virginia [Member] | Jul. 31, 2005 Payment for Plaintiffs Attorney Fees [Member] PFOA Matters: Drinking Water Actions [Member] | Jul. 31, 2005 Payment to fund community health project [Member] PFOA Matters: Drinking Water Actions [Member] | Mar. 31, 2014 Funding for medical monitoring program [Member] PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Accrual balance | $ 15 |  |  |  |  |  |  |
Binding settlement agreement, class size |  | 80,000 |  |  |  |  |  |
Settlement payments |  |  |  |  |  | 23 | 70 |
Loss contingency, potential additional loss |  |  |  |  |  |  |  | 235
Escrow deposit |  |  | $ 1 |  |  |  |  |
Lawsuits alleging personal injury |  |  |  | 104 |  |  |  |
New lawsuits filed alleging personal injury |  |  |  | 21 |  |  |  |
Lawsuits alleging wrongful death |  |  |  | 6 |  |  |  |
Lawsuits alleging personal injury that have not been served |  |  |  |  | 900 |  |  |

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- Definition The total number of new lawsuits filed alleging personal injury pertaining to a loss contingency during the period. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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