UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Comprehensive income (loss)
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	$ 3,117	$ 35,274	$ (12,145)	$ 93,415
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive (loss) - Foreign currency translation adjustment	(13,516)	(30,505)	(6,153)	(59,678)
Comprehensive income (loss) for the period	(10,399)	4,769	(18,298)	33,737
Comprehensive (income) loss attributable to the noncontrolling and redeemable noncontrolling interests	5,483	(24,665)	34,829	(59,668)
Comprehensive income (loss) attributable to Stagwell Inc. common shareholders	$ (4,916)	$ (19,896)	$ 16,531	$ (25,931)