XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Income Taxes Tax Act (Details) $ in Millions | Sep. 30, 2018 USD ($)
--- | ---
Tax Act [Abstract] |
Tax Act Impact | $ 16.7

X
- Definition Tax Act [Abstract] + References No definition available. + Details
Name: | ipg_TaxActAbstract
Namespace Prefix: | ipg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax expense related to the Tax Act true-up + References No definition available. + Details
Name: | ipg_TaxActImpact
Namespace Prefix: | ipg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant