Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
REVENUE:
Net revenue	$ 2,328.5	$ 2,375.5	$ 4,505.4	$ 4,602.7
Billable expenses	338.0	360.2	682.1	701.5
Total revenue	2,666.5	2,735.7	5,187.5	5,304.2
OPERATING EXPENSES:
Salaries and related expenses	1,598.6	1,590.2	3,175.9	3,154.6
Office and other direct expenses	340.5	349.8	670.8	673.2
Billable expenses	338.0	360.2	682.1	701.5
Cost of services	2,277.1	2,300.2	4,528.8	4,529.3
Selling, general and administrative expenses	13.9	19.4	26.8	38.7
Depreciation and amortization	66.5	67.1	133.0	134.9
Restructuring charges	(1.7)	(0.1)	(0.1)	6.5
Total operating expenses	2,355.8	2,386.6	4,688.5	4,709.4
OPERATING INCOME	310.7	349.1	499.0	594.8
EXPENSES AND OTHER INCOME:
Interest expense	(63.2)	(41.0)	(119.0)	(80.4)
Interest income	35.5	11.2	75.7	21.0
Other Expense, Net	(4.4)	(4.5)	(11.1)	(10.7)
Total (expenses) and other income	(32.1)	(34.3)	(54.4)	(70.1)
Income before income taxes	278.6	314.8	444.6	524.7
Provision for income taxes	10.6	83.7	44.4	132.8
Income of consolidated companies	268.0	231.1	400.2	391.9
Equity in net income of unconsolidated affiliates	0.7	0.7	0.6	0.8
NET INCOME	268.7	231.8	400.8	392.7
Net income attributable to noncontrolling interests	(3.2)	(2.2)	(9.3)	(3.7)
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$ 265.5	$ 229.6	$ 391.5	$ 389.0
Earnings per share, Basic	$ 0.69	$ 0.58	$ 1.01	$ 0.99
Earnings per share, Diluted	$ 0.68	$ 0.58	$ 1.01	$ 0.98
Weighted-average number of common shares outstanding, Basic	385.7	393.1	385.8	393.8
Weighted-average number of common shares outstanding, Diluted	387.7	396.8	387.6	397.5