XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.25.3

Rationalization Charges - Activity in Rationalization Plan Reserves (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2024 |  |  | $ 29,318 |
Charged to expense | $ 7,189 | $ 19,483 | 28,012 | $ 38,033
Utilized and currency translation |  |  | (26,737) |
Balance at September 30, 2025 | 30,593 |  | 30,593 |
Employee Severance and Benefits |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2024 |  |  | 29,318 |
Charged to expense |  |  | 9,392 |
Utilized and currency translation |  |  | (8,117) |
Balance at September 30, 2025 | 30,593 |  | 30,593 |
Plant Exit Costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2024 |  |  | 0 |
Charged to expense |  |  | 7,368 |
Utilized and currency translation |  |  | (7,368) |
Balance at September 30, 2025 | 0 |  | 0 |
Non-Cash Asset Write-Downs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Balance at December 31, 2024 |  |  | 0 |
Charged to expense |  |  | 11,252 |
Utilized and currency translation |  |  | (11,252) |
Balance at September 30, 2025 | $ 0 |  | $ 0 |

X
- Definition Rationalization Plan Reserves Utilized and CTA + References No definition available. + Details
Name: | slgn_RationalizationPlanReservesUtilizedandCTA
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
Name: | us-gaap_RestructuringReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_RestructuringReserveRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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