Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUE:
Net revenue	$ 2,261.7	$ 1,954.6	$ 6,559.0	$ 5,780.1
Billable expenses	280.3	170.9	749.6	730.9
Total revenue	2,542.0	2,125.5	7,308.6	6,511.0
OPERATING EXPENSES:
Salaries and related expenses	1,511.2	1,269.9	4,389.2	3,998.8
Office and other direct expenses	300.9	307.9	894.8	1,003.1
Billable expenses	280.3	170.9	749.6	730.9
Cost of services	2,092.4	1,748.7	6,033.6	5,732.8
Selling, general and administrative expenses	32.2	9.9	89.8	36.4
Depreciation and amortization	69.4	71.0	208.7	216.9
Restructuring charges	(3.5)	47.3	(2.4)	159.9
Total operating expenses	2,190.5	1,876.9	6,329.7	6,146.0
OPERATING INCOME	351.5	248.6	978.9	365.0
EXPENSES AND OTHER INCOME:
Interest expense	(42.9)	(50.8)	(135.1)	(145.4)
Interest income	7.4	6.1	21.9	22.7
Other Nonoperating Income (Expense)	2.3	(11.3)	(76.9)	(54.6)
Total (expenses) and other income	(33.2)	(56.0)	(190.1)	(177.3)
Income before income taxes	318.3	192.6	788.8	187.7
Provision for (benefit of) income taxes	73.9	(86.3)	184.4	(50.1)
Income of consolidated companies	244.4	278.9	604.4	237.8
Equity in net income (loss) of unconsolidated affiliates	0.2	(0.4)	0.4	(0.6)
NET INCOME	244.6	278.5	604.8	237.2
Net (income) loss attributable to noncontrolling interests	(4.7)	1.2	(9.9)	1.6
NET INCOME AVAILABLE TO IPG COMMON STOCKHOLDERS	$ 239.9	$ 279.7	$ 594.9	$ 238.8
Earnings per share, Basic	$ 0.61	$ 0.72	$ 1.51	$ 0.61
Earnings per share, Diluted	$ 0.60	$ 0.71	$ 1.49	$ 0.61
Weighted-average number of common shares outstanding, Basic	393.5	389.6	392.8	388.9
Weighted-average number of common shares outstanding, Diluted	399.8	393.9	398.3	392.6