Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
REVENUE:
Net revenue	$ 2,296.2	$ 2,261.7	$ 6,898.9	$ 6,559.0
Billable expenses	341.5	280.3	1,043.0	749.6
Total revenue	2,637.7	2,542.0	7,941.9	7,308.6
OPERATING EXPENSES:
Salaries and related expenses	1,546.8	1,511.2	4,701.4	4,389.2
Office and other direct expenses	327.9	300.9	1,001.1	894.8
Billable expenses	341.5	280.3	1,043.0	749.6
Cost of services	2,216.2	2,092.4	6,745.5	6,033.6
Selling, general and administrative expenses	18.5	32.2	57.2	89.8
Depreciation and amortization	67.0	69.4	201.9	208.7
Restructuring charges	(5.8)	(3.5)	0.7	(2.4)
Total operating expenses	2,295.9	2,190.5	7,005.3	6,329.7
OPERATING INCOME	341.8	351.5	936.6	978.9
EXPENSES AND OTHER INCOME:
Interest expense	(44.9)	(42.9)	(125.3)	(135.1)
Interest income	17.0	7.4	38.0	21.9
Other Income (Expense), Net	17.5	2.3	6.8	(76.9)
Total (expenses) and other income	(10.4)	(33.2)	(80.5)	(190.1)
Income before income taxes	331.4	318.3	856.1	788.8
Provision for income taxes	76.4	73.9	209.2	184.4
Income of consolidated companies	255.0	244.4	646.9	604.4
Equity in net income of unconsolidated affiliates	2.5	0.2	3.3	0.4
NET INCOME	257.5	244.6	650.2	604.8
Net income attributable to noncontrolling interests	(5.7)	(4.7)	(9.4)	(9.9)
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$ 251.8	$ 239.9	$ 640.8	$ 594.9
Earnings per share, Basic	$ 0.64	$ 0.61	$ 1.63	$ 1.51
Earnings per share, Diluted	$ 0.64	$ 0.60	$ 1.62	$ 1.49
Weighted-average number of common shares outstanding, Basic	390.6	393.5	392.7	392.8
Weighted-average number of common shares outstanding, Diluted	394.1	399.8	396.2	398.3