XML 151 R128.htm IDEA: XBRL DOCUMENT v3.20.4

Fair Value on a Nonrecurring Basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 3,995,000,000.0	$ 3,565,500,000
Discount rate ceiling contingent acquisition obligations	4.00%
Level 1
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 0.0
Level 2
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	3,951,100,000
Level 3
Fair value assets and liabilities measured on nonrecurring basis
Long-term debt, fair value	$ 43,900,000

X

- Definition

Discount rate ceiling contingent acquisition obligations

+ References

No definition available.

+ Details

Name:	ipg_Discountrateceilingcontingentacquisitionobligations
Namespace Prefix:	ipg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: