Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
REVENUE:
Net revenue	$ 2,242.7	$ 2,309.0	$ 6,752.7	$ 6,814.4
Billable expenses	386.1	369.5	1,082.0	1,051.6
Total revenue	2,628.8	2,678.5	7,834.7	7,866.0
OPERATING EXPENSES:
Salaries and related expenses	1,464.0	1,531.1	4,594.4	4,707.0
Office and other direct expenses	327.1	318.8	1,007.6	989.6
Billable expenses	386.1	369.5	1,082.0	1,051.6
Cost of services	2,177.2	2,219.4	6,684.0	6,748.2
Selling, general and administrative expenses	20.8	16.9	86.4	43.7
Depreciation and amortization	65.3	66.0	195.5	199.0
Goodwill, Impairment Loss	232.1	0.0	232.1	0.0
Restructuring charges	0.5	(0.6)	1.4	(0.7)
Total operating expenses	2,495.9	2,301.7	7,199.4	6,990.2
OPERATING INCOME	132.9	376.8	635.3	875.8
EXPENSES AND OTHER INCOME:
Interest expense	(54.9)	(58.7)	(175.6)	(164.2)
Interest income	34.2	35.1	119.5	97.3
Other Expense, Net	(2.7)	(13.7)	(13.4)	(24.8)
Total (expenses) and other income	(23.4)	(37.3)	(69.5)	(91.7)
Income before income taxes	109.5	339.5	565.8	784.1
Provision for income taxes	85.3	91.5	208.2	135.9
Income of consolidated companies	24.2	248.0	357.6	648.2
Equity in net (loss) income of unconsolidated affiliates	0.0	(2.3)	(0.2)	(1.7)
NET INCOME	24.2	245.7	357.4	646.5
Net income attributable to noncontrolling interests	(4.1)	(2.0)	(12.4)	(11.3)
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$ 20.1	$ 243.7	$ 345.0	$ 635.2
Earnings per share, Basic	$ 0.05	$ 0.64	$ 0.92	$ 1.65
Earnings per share, Diluted	$ 0.05	$ 0.63	$ 0.91	$ 1.64
Weighted-average number of common shares outstanding, Basic	373.9	383.6	376.2	385.0
Weighted-average number of common shares outstanding, Diluted	376.8	385.5	378.7	386.8