Planned Acquisition of IPG by Omnicom (Details) $ in Millions	3 Months Ended
	Sep. 30, 2025 USD ($)
Business Combination [Line Items]
Conversion ratio	0.344
Percentage of voting interests in post-merger entity - omnicom shareholders (as a percent)	60.60%
Percentage of voting interests in post-merger entity - ipg shareholders (as a percent)	39.40%
Loss on contract termination	$ 439.0
Loss on contract termination, (as percent)	50.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

INTERPUBLIC GROUP OF COMPANIES, INC. 10-Q