Acquisition costs, amortization period

No definition available.

Name:	ip_AcquisitionCostsAmortizationPeriod
Namespace Prefix:	ip_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Business combination, aggregate purchase price

+ References

No definition available.

+ Details

Name:	ip_BusinessCombinationAggregatePurchasePrice
Namespace Prefix:	ip_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

+ Details

Name:	us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

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+ Details

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

- Definition

Amount of increase in noncontrolling interest from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
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+ Details

Name:	us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
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+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ip_SpainBoxPlantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ip_CorrugatedPackagingBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=ip_FreedomMember
Namespace Prefix:
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Balance Type:
Period Type:

ACQUISITIONS Narrative (Details) € in Millions, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Apr. 01, 2021 USD ($)
Business Acquisition [Line Items]
Contract with Customer, Liability						$ 115
Acquisitions, net of cash acquired				$ 80	$ 64
Spain Box Plants
Business Acquisition [Line Items]
Business combination, aggregate purchase price	$ 83	€ 71
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	9
Business combination, pro forma information, earnings or loss of scquiree since scquisition fate, sctual	1			$ 1
Corrugated Packaging Business
Business Acquisition [Line Items]
Contract with Customer, Liability						$ 115
Noncontrolling Interest, Increase from Business Combination	$ 115
Acquisition costs, amortization period	15 years	15 years
Freedom [Member]
Business Acquisition [Line Items]
Acquisitions, net of cash acquired			$ 56