AUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Revenues	$ 2,527,177	$ 2,687,792	$ 1,469,363
Operating expenses:
Cost of services	1,621,174	1,673,576	906,856
Office and general expenses	661,250	601,536	424,038
Depreciation and amortization	142,831	131,273	77,503
Impairment and other losses	11,395	122,179	16,240
Costs and Expenses, Total	2,436,650	2,528,564	1,424,637
Operating Income (Loss), Total	90,527	159,228	44,726
Other income (expense):
Interest expense, net	(90,644)	(76,062)	(31,894)
Foreign exchange, net	(2,960)	(2,606)	(3,332)
Gain (loss) on disposition of business	94,505		43,440
Other, net	(359)	(4,975)	7,020
Nonoperating Income (Expense), Total	542	(83,643)	14,832
Income before income taxes and equity in earnings of non-consolidated affiliates	91,069	75,585	59,558
Income tax expense	40,557	25,462	23,398
Income before equity in earnings of non-consolidated affiliates	50,512	50,123	36,160
Equity in (loss) of non-consolidated affiliates	(8,870)	(79)	(240)
Net income	41,642	50,044	35,920
Net (income) loss attributable to noncontrolling and redeemable noncontrolling interests	(41,508)	(30,125)	(14,884)
Net income attributable to Stagwell Inc. common shareholders	$ 134	$ 19,919	$ 21,036
Earnings Per Share [Abstract]
Earnings per share, basic	$ 0	$ 0.16	$ (0.04)
Earnings per share, diluted	$ 0	$ 0.12	$ (0.04)
Weighted Average Number Of Shares Outstanding For Basic and Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	117,259	124,262	90,426
Weighted Average Number of Shares Outstanding, Diluted	122,170	296,596	90,426