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Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions	1 Months Ended
	Mar. 31, 2017	Mar. 31, 2018
PRP site
Commitments And Contingent Liabilities [Line Items]
Estimated future remediation costs		$ 7
Non- PRP sites
Commitments And Contingent Liabilities [Line Items]
Estimated future remediation costs		$ 9
Penalty Notification Alleging Misclassification of Importation of Certain Goods into U.S. During 2004-2009 | U.S. Customs and Border Protection (CBP)
Commitments And Contingent Liabilities [Line Items]
Assessed penalty	$ 8
Penalties paid	$ 1

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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