UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current Assets
Cash and cash equivalents	$ 181,309	$ 131,339
Accounts receivable, net	769,291	716,415
Expenditures billable to clients	150,234	173,194
Other current assets	162,233	114,200
Total Current Assets	1,263,067	1,135,148
Fixed assets, net	65,267	72,706
Operating Lease, Right-of-Use Asset	219,717	219,400
Goodwill	1,600,714	1,554,146
Other intangible assets, net	866,780	836,783
Deferred Tax Assets, Tax Deferred Expense	251,622	46,926
Other assets	50,008	43,112
Total Assets	4,317,175	3,908,221
Current Liabilities
Accounts payable	484,069	449,347
Accrued media	222,472	245,883
Accruals and other liabilities	319,724	265,356
Advance billings	339,623	294,609
Current portion of lease liabilities - operating leases	57,192	60,195
Current portion of deferred acquisition consideration	41,391	51,906
Total Current Liabilities	1,464,471	1,367,296
Long-term debt	1,464,242	1,353,624
Long-term portion of deferred acquisition consideration	50,272	50,209
Long-term lease liabilities - operating leases	231,152	245,397
Deferred Tax Liabilities, Tax Deferred Income	49,388	47,239
Long-term tax receivable agreement liability	223,445	25,493
Other liabilities	53,009	33,646
Total Liabilities	3,535,979	3,122,904
Redeemable Noncontrolling Interests	9,248	8,412
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Paid-in capital	765,898	343,647
Retained earnings	4,923	11,740
Accumulated other comprehensive loss	(20,936)	(23,773)
Stagwell Inc. Shareholders’ Equity	750,146	331,731
Noncontrolling interests	21,802	445,174
Total Shareholders’ Equity	771,948	776,905
Liabilities and Equity, Total	4,317,175	3,908,221
Common Class A and Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	261	115
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	$ 0	$ 2