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Summary of Significant Accounting Policies and Estimates - Non-controlling Interest (Details) - Fluence Energy, LLC	Jun. 30, 2022	Nov. 01, 2021
Noncontrolling Interest [Line Items]
Fluence Energy, LLC percentage owned	66.08%	31.60%
Founders percentage owned	33.92%	68.40%

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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