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

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