UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Revenues	$ 622,444	$ 642,903
Operating expenses:
Cost of services	413,898	411,970
Office and general expenses	158,836	144,512
Depreciation and amortization	33,477	31,204
Impairment and other losses	0	557
Costs and Expenses, Total	606,211	588,243
Operating Income (Loss), Total	16,233	54,660
Other income (expense):
Interest expense, net	(18,189)	(18,729)
Foreign exchange, net	(670)	(306)
Other, net	220	156
Nonoperating Income (Expense), Total	(18,639)	(18,879)
Income (loss) before income taxes and equity in earnings of non-consolidated affiliates	(2,406)	35,781
Income tax expense	2,384	3,189
Income (loss) before equity in earnings of non-consolidated affiliates	(4,790)	32,592
Equity in income (loss) of non-consolidated affiliates	(227)	1,030
Net income (loss)	(5,017)	33,622
Net (income) loss attributable to noncontrolling and redeemable noncontrolling interests	5,460	(20,947)
Net income attributable to Stagwell Inc. common shareholders	$ 443	$ 12,675
Earnings Per Share [Abstract]
Earnings per share, basic	$ 0	$ 0.1
Earnings per share, diluted	$ (0.01)	$ 0.1
Weighted Average Number Of Shares Outstanding For Basic and Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	125,199	122,285
Weighted Average Number of Shares Outstanding, Diluted	289,806	297,484