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COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Details) - Pending Litigation	Sep. 28, 2018 claim	Apr. 18, 2014 item
City of Providence
Loss Contingencies
The number of other securities exchanges a lawsuit has been filed against | item		14
VIX Litigation
Loss Contingencies
Number of Commodity Exchange Act claims | claim	3

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- Definition

The number of Commodity Exchange Act claims.

+ References

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- Definition

The number of other securities exchanges a lawsuit has been filed against.

+ References

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- Definition

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.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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