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Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2017 | Mar. 31, 2017
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PRP Site |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Estimated future remediation costs | $ 8 |  |
Non- PRP Sites |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Estimated future remediation costs | $ 7 |  |
Penalty Notification Alleging Misclassification of Importation of Certain Goods into U.S. During 2004-2009 | U.S. Customs and Border Protection |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Initial and subsequent penalty assessed |  | $ 6 | $ 18

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