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Noncontrolling and Redeemable Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Income attributable to noncontrolling interests	$ 38,573	$ 14,884	$ 15,105
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	30,438	15,296	18,231
Nonredeemable Noncontrolling Interest	462,097	508,287
Stagwell Global
Noncontrolling Interest [Line Items]
Income attributable to noncontrolling interests	14,121
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	5,986	9,170	$ 18,231
Nonredeemable Noncontrolling Interest	33,691	32,914
Stagwell Media
Noncontrolling Interest [Line Items]
Income attributable to noncontrolling interests	24,452
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	24,452	6,126
Nonredeemable Noncontrolling Interest	$ 428,406	$ 475,373

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