UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 138,529	$ 220,589
Accounts receivable, net	659,068	645,846
Expenditures billable to clients	97,590	93,077
Other current assets	77,930	71,443
Total Current Assets	973,117	1,030,955
Fixed assets, net	94,839	98,878
Operating Lease, Right-of-Use Asset	260,763	273,567
Goodwill	1,569,532	1,566,956
Other intangible assets, net	888,455	907,529
Other assets	114,227	115,447
Total Assets	3,900,933	3,993,332
Current Liabilities
Accounts payable	308,759	357,253
Accrued media	283,578	240,506
Accruals and other liabilities	152,937	248,477
Advance billings	334,933	337,034
Current portion of lease liabilities - operating leases	75,939	76,349
Current portion of deferred acquisition consideration	94,039	90,183
Total Current Liabilities	1,250,185	1,349,802
Long-term debt	1,235,281	1,184,707
Long-term portion of deferred acquisition consideration	71,645	71,140
Long-term lease liabilities - operating leases	278,978	294,049
Deferred tax liabilities, net	43,023	40,109
Other liabilities	70,371	69,780
Total Liabilities	2,949,483	3,009,587
Redeemable Noncontrolling Interests	32,517	39,111
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Paid-in capital	469,891	491,899
Retained earnings	30,324	29,445
Accumulated other comprehensive loss	(13,253)	(38,941)
Stagwell Inc. Shareholders' Equity	487,094	482,537
Noncontrolling interests	431,839	462,097
Total Shareholders' Equity	918,933	944,634
Liabilities and Equity, Total	3,900,933	3,993,332
Common Class A and Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	130	132
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	$ 2	$ 2