Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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-Topic 460
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The total number of new claims filed pertaining to a loss contingency during the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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Number of plaintiffs that have filed claims pertaining to a loss contingency.

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-Topic 450
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Number of pending claims pertaining to a loss contingency.

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