XML 84 R70.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Restructuring and asset impairment - Additional Information (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2022 USD ($) | Dec. 31, 2024 USD ($) facility employee | Dec. 31, 2023 USD ($) position | Dec. 31, 2022 USD ($) manufacturing_plant
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Future additional charges expected to be recognized |  | $ 3,000 |  |
Other asset impairments |  | $ 0 | $ 0 | $ 10,095
Impact of new accounting pronouncements |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Other asset impairments | $ 3,747 |  |  |
Industrial Paper Packaging |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Number of small tube and core plants | manufacturing_plant |  |  |  | 2
Organizational Effectiveness Efforts |  |  |  |
Disposal Group, Including Discontinued Operations [Line Items] |  |  |  |
Elimination of positions due to realignment of cost structure (position) |  | 300 | 200 |
Number of facilities closed | facility |  | 2 |  |

X
- Definition Number of Small Tube And Core Plants + References No definition available. + Details
Name: | son_NumberOfSmallTubeAndCorePlants
Namespace Prefix: | son_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restructuring and Related Cost, Number of Facilities Closed + References No definition available. + Details
Name: | son_RestructuringAndRelatedCostNumberOfFacilitiesClosed
Namespace Prefix: | son_
Data Type: | xbrli:integerItemType
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_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-2 + Details
Name: | us-gaap_OtherAssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expected cost remaining for the specified restructuring cost. + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s). + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ReclassificationTypeAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=son_IndustrialPaperPackagingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=son_OrganizationalEffectivenessEffortsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |