Charge against earnings for asbestos related payments.

No definition available.

Name:	ow_AsbestosRelatedCosts
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents accrual of asbestos related liability.

+ References

No definition available.

+ Details

Name:	ow_AsbestosRelatedLiabilityAccrued
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash payments per claim disposed including legal costs.

+ References

No definition available.

+ Details

Name:	ow_CashPaymentsPerClaimDisposed
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The approximate aggregate number of plaintiffs and claimants settled, dismissed and otherwise disposed of, as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ow_ClaimsDisposedOfToDate
Namespace Prefix:	ow_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The approximate amount of plaintiffs and claimants in asbestos lawsuits and claims in which the entity is a named defendant.

+ References

No definition available.

+ Details

Name:	ow_LossContingencyPlaintiffsAndClaimantsNumber
Namespace Prefix:	ow_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The average indemnity payment per disposed claim.

+ References

No definition available.

+ Details

Name:	ow_LossContingencySettlementPerClaim
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Payments for Asbestos-Related Liabilities.

+ References

No definition available.

+ Details

Name:	ow_PaymentsForAsbestosRelatedLiabilities
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The approximate percentage of all the asbestos-related plaintiffs and claimants for which the entity is a named defendant.

+ References

No definition available.

+ Details

Name:	ow_PercentageOfAsbestosPlaintiffsApproximatePercentage
Namespace Prefix:	ow_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents information pertaining to period for number of claims to be received.

+ References

No definition available.

+ Details

Name:	ow_PeriodForNumberOfClaimsToBeReceived
Namespace Prefix:	ow_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The approximate amount of previous sales of goods containing asbestos.

+ References

No definition available.

+ Details

Name:	ow_SalesRevenueAsbestos
Namespace Prefix:	ow_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (cc)
-URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437

+ Details

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

- 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

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

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_MajorityShareholderMember
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- Details

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Contingencies - Asbestos (Details)	3 Months Ended	12 Months Ended
Contingencies - Asbestos (Details)	Mar. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 1993 USD ($)
Asbestos
Sale of goods containing asbestos from 1948 to 1958	$ 40,000,000
OI Inc.
Asbestos
Number of pending plaintiffs and claimants \| item	1,270
Approximate number of claims disposed of to date \| item	399,000
Average indemnity payment per claim	$ 9,600
Payments for Asbestos-Related Liabilities		$ 110,000,000	$ 125,000,000	$ 138,000,000
Asbestos-related liability, total amount accrued beginning in 1993 through 2016 before insurance recoveries	$ 4,900,000,000				$ 975,000,000
Asbestos related charges		0	0	16,000,000
Cash payments per claim disposed including legal costs		83,000	71,000	$ 95,000
Accrual of asbestos related liability		$ 582,000,000	$ 692,000,000
Period for number of claims to be received	10 years
Damages unspecified or sufficient to invoke jurisdictional minimum \| OI Inc.
Asbestos
Percentage of asbestos plaintiffs, approximate percentage		89.00%
Damages of $15 million or less \| OI Inc.
Asbestos
Percentage of asbestos plaintiffs, approximate percentage		8.00%
Damages greater than $15 million but less than $100 million \| OI Inc.
Asbestos
Percentage of asbestos plaintiffs, approximate percentage		3.00%
Minimum \| Damages greater than $15 million but less than $100 million \| OI Inc.
Asbestos
Loss contingency, plaintiffs damages		$ 15,000,000
Maximum
Asbestos
Loss contingency, plaintiffs damages		725,000,000
Maximum \| Damages of $15 million or less \| OI Inc.
Asbestos
Loss contingency, plaintiffs damages		15,000,000
Maximum \| Damages greater than $15 million but less than $100 million \| OI Inc.
Asbestos
Loss contingency, plaintiffs damages		$ 100,000,000