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Noncontrolling and Redeemable Noncontrolling Interests - Changes in Noncontrolling Interests (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Noncontrolling Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | $ 15,000 | $ 1,470 | $ 33,537 | $ 2,623 |
Nonredeemable Noncontrolling Interest | 513,085 |  | 513,085 |  | $ 508,287
Adjustments to Additional Paid in Capital, Changes due to Business Combinations | (1,000) | 0 | (1,000) | 0 |
Net Income Loss Including Transfer from Non Controlling Interests | 9,463 | 17,345 | 22,138 | 21,710 |
Stagwell Inc. Shareholders' Equity |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Adjustments to Additional Paid in Capital, Changes due to Business Combinations | (1,000) | 0 | (1,000) | 0 |
Stagwell Global |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 980 | 1,470 | 1,796 | 2,623 |
Nonredeemable Noncontrolling Interest | 29,459 |  | 29,459 |  | 32,914
Stagwell Media |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 14,020 | $ 0 | 31,741 | $ 0 |
Nonredeemable Noncontrolling Interest | $ 483,626 |  | $ 483,626 |  | $ 475,373

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