Equity - Schedule of Economic Interests (Details) - Spark Hold Co	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Economic interests percentage	41.04%	40.53%
Affiliated Owners
Class of Stock [Line Items]
Economic interests percentage	58.96%	59.47%

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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