Acquisitions Precidian Acquisition (Details) - Precidian Investments [Member]	Jan. 22, 2016
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	20.00%
Noncontrolling Interest, Ownership Percentage by Parent	75.00%

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.

No definition available.

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