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Noncontrolling and Redeemable Noncontrolling Interests - Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	$ (4,581)	$ 15,000	$ 7,498	$ 33,537
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest	(971)	(944)	3,514	1,466	$ (8,135)
Income attributable to noncontrolling interests	(5,552)	14,056	(11,012)	35,003
Nonredeemable Noncontrolling Interest	438,299		438,299		462,097
Stagwell Global
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(29)	980	219	1,796
Income attributable to noncontrolling interests	1,000	36	3,295	3,262
Nonredeemable Noncontrolling Interest	29,339		29,339		33,691
Stagwell Media
Noncontrolling Interest [Line Items]
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest	(4,552)	14,020	(7,717)	31,741
Income attributable to noncontrolling interests	4,552	$ 14,020	7,717	$ 31,741
Nonredeemable Noncontrolling Interest	$ 408,960		$ 408,960		$ 428,406

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