Equity - Schedule of Economic Interests (Details) - Spark HoldCo	3 Months Ended	12 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Class of Stock [Line Items]
Economic interest	51.79%	48.20%
Affiliated Owners
Class of Stock [Line Items]
Economic interest	48.21%	51.80%

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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+ Details