Debt Instrument Offering Price Percentage at Principle Amount

No definition available.

Name:	slgn_DebtInstrumentOfferingPricePercentageatPrincipleAmount
Namespace Prefix:	slgn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=slgn_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_BankBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_OnePointFourPercentSeniorNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=slgn_DebtInstrumentRedemptionOneMonthPriorToTheParCallDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=slgn_DebtInstrumentRedemptionPeriodOnOrAfterTheParCallDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=slgn_DebtInstrumentRedemptionPeriodUponTheOccurrenceOfChangeOfControlRepurchaseEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_TwoandOneQuarterPercentSeniorNotesDue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_FourandOneEighthPercentSeniorNotesDue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_FourandThreeQuartersPercentSeniorNotesdue2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=slgn_ThreeandOneQuarterPercentSeniorNotesdue2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT - 1.4% Senior Secured Notes (Details)						12 Months Ended
LONG-TERM DEBT - 1.4% Senior Secured Notes (Details)	Nov. 09, 2021 USD ($)	Feb. 10, 2021 USD ($)	Feb. 26, 2020 USD ($)	Feb. 26, 2020 EUR (€)	Nov. 12, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Feb. 26, 2020 EUR (€)	Feb. 13, 2017 USD ($)	Feb. 13, 2017 EUR (€)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt						$ 1,499,725,000	$ 1,639,661,000	$ 400,000,000
Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount							$ 900,000,000
Repayments of debt	$ 400,000,000					$ 900,000,000
Bank Debt \| Term Loan
Debt Instrument [Line Items]
Repayments of debt		$ 500,000,000
1.4% Senior Secured Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 500,000,000
Stated interest rate		1.40%				1.40%
Debt instrument offering price percentage at principal amount		99.945%
Proceeds from issuance of long-term debt		$ 499,700,000
1.4% Senior Secured Notes \| Senior Notes \| Debt Instrument, Redemption - One Month Prior To The Par Call Date
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.00%
1.4% Senior Secured Notes \| Senior Notes \| Debt Instrument, Redemption Period - On or After the Par Call Date
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		100.00%
1.4% Senior Secured Notes \| Senior Notes \| Debt Instrument, Redemption Period - Upon the Occurrence of Repurchase Event
Debt Instrument [Line Items]
Debt instrument, redemption price, percentage		101.00%
2¼% Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount \| €									€ 500,000,000
Proceeds from issuance of long-term debt \| €				€ 494,000,000
2¼% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount \| €									€ 500,000,000
Stated interest rate						2.25%
Debt instrument offering price percentage at principal amount			100.00%						100.00%
4⅛% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount			$ 200,000,000		$ 400,000,000
Stated interest rate						4.125%
Debt instrument offering price percentage at principal amount					100.00%
Proceeds from issuance of long-term debt			$ 196,500,000		$ 394,700,000
4¾% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount										$ 300,000,000
Stated interest rate						4.75%
Debt instrument offering price percentage at principal amount										100.00%	100.00%
3¼% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount \| €											€ 650,000,000
Stated interest rate						3.25%
Debt instrument offering price percentage at principal amount										100.00%	100.00%