CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
REVENUE:
Revenue before billable expenses	$ 2,172.7	$ 2,327.1	$ 4,169.0	$ 4,510.0
Billable expenses	364.1	382.9	690.4	695.9
Total revenue	2,536.8	2,710.0	4,859.4	5,205.9
OPERATING EXPENSES:
Salaries and related expenses	1,378.2	1,557.6	2,792.6	3,130.4
Office and other direct expenses	325.2	358.4	644.4	680.5
Billable expenses	364.1	382.9	690.4	695.9
Cost of services	2,067.5	2,298.9	4,127.4	4,506.8
Selling, general and administrative expenses	46.4	27.6	86.8	65.6
Depreciation and amortization	61.2	65.0	122.2	130.2
Restructuring charges	118.0	0.3	321.3	0.9
Total operating expenses	2,293.1	2,391.8	4,657.7	4,703.5
OPERATING INCOME	243.7	318.2	201.7	502.4
EXPENSES AND OTHER INCOME:
Interest expense	(50.5)	(57.9)	(100.6)	(120.7)
Interest income	26.2	36.6	60.8	85.3
Other expense, net	(1.4)	(1.2)	(38.3)	(10.7)
Total (expenses) and other income	(25.7)	(22.5)	(78.1)	(46.1)
INCOME BEFORE INCOME TAXES	218.0	295.7	123.6	456.3
Provision for income taxes	54.6	75.6	45.4	122.9
INCOME OF CONSOLIDATED COMPANIES	163.4	220.1	78.2	333.4
Equity in net income (loss) of unconsolidated affiliates	0.2	(0.5)	0.1	(0.2)
NET INCOME	163.6	219.6	78.3	333.2
Net income attributable to non-controlling interests	(1.1)	(5.1)	(1.2)	(8.3)
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$ 162.5	$ 214.5	$ 77.1	$ 324.9
Earnings per share available to IPG common stockholders:
Basic (in dollars per share)	$ 0.44	$ 0.57	$ 0.21	$ 0.86
Diluted (in dollars per share)	$ 0.44	$ 0.57	$ 0.21	$ 0.86
Weighted-average number of common shares outstanding:
Basic (in shares)	367.9	376.3	370.2	377.4
Diluted (in shares)	370.1	378.7	372.5	379.7