LONG-TERM DEBT - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage	7.00%
Payment for Debt Extinguishment or Debt Prepayment Cost	$ 5,000,000
Debt Instrument, Consolidated Total, Maximum Leverage Ratio	375.00%
Ration Below 2.50
Debt Instrument [Line Items]
Debt Instrument, Consolidated Total Leverage Ratio, Maximum	2.50
Ration Below 2.50 \| Ratio Equal to Or Above 2.00
Debt Instrument [Line Items]
Maximum annual restricted payments	$ 60,000,000
Ratio Below 2.00
Debt Instrument [Line Items]
Income Tax Examination, Maximum Annual Restricted Payments Increase	$ 90,000,000
Debt Instrument, Consolidated Total Leverage Ratio, Maximum	2.00
Ratio Equal to Or Above 2.00
Debt Instrument [Line Items]
Debt Instrument, Consolidated Total Leverage Ratio, Minimum	2.00
Maximum Deposit Amount
Debt Instrument [Line Items]
Income Tax Examination, Deposit Amount With Credit Agreement Agent to Eliminate Maximum Annual Restricted Payments	$ 120,000,000
Minimum Deposit Amount
Debt Instrument [Line Items]
Income Tax Examination, Deposit Amount With Credit Agreement Agent to Eliminate Maximum Annual Restricted Payments	60,000,000
Available Liquidity
Debt Instrument [Line Items]
Income Tax Examination, Available Liquidity Required to Eliminate Limits on Maximum Annual Restricted Payments	225,000,000
Receivables Securitization Program
Debt Instrument [Line Items]
Total borrowing capacity	120,000,000
Long-term line of credit outstanding	$ 105,000,000	$ 75,000,000
Line of Credit Facility, Interest Rate at Period End	5.34%	5.19%
Term Loan A Due 2029 \| Interest Rate Swap \| Other Liabilities
Debt Instrument [Line Items]
Interest Rate Fair Value Hedge Liability at Fair Value		$ 9,000,000
Term Loan A Due 2029 \| Interest Rate Swap \| Designated as Hedging Instrument \| Cash Flow Hedging \| 2024 to 2026
Debt Instrument [Line Items]
Notional amount		300,000,000
Term Loan A Due 2029 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative, fixed interest rate	4.13%
Term Loan A Due 2029 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative, fixed interest rate	4.16%
Term Loan F Due 2027 \| Interest Rate Swap \| Deferred Charges and Other Assets
Debt Instrument [Line Items]
Fair value of interest rate swaps	$ 14,000,000	30,000,000
Term Loan F Due 2027 \| Interest Rate Swap \| Designated as Hedging Instrument \| Cash Flow Hedging \| 2024
Debt Instrument [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer	2 years
Number of Interest Rate Swaps Unwound	4
Notional Amount, Interest Rate Swaps, Unwound	$ 200,000,000
Term Loan F Due 2027 \| Interest Rate Swap \| Designated as Hedging Instrument \| Cash Flow Hedging \| 2024 to 2026
Debt Instrument [Line Items]
Notional amount		400,000,000
Swap Unwind, Cash Proceeds	12,000,000
Term Loan F Due 2027 \| Interest Rate Swap \| Designated as Hedging Instrument \| Cash Flow Hedging \| 2025
Debt Instrument [Line Items]
Notional amount	$ 200,000,000
Number of New Interest Rate Swaps	4
Term Loan F Due 2027 \| London Interbank Offered Rate (LIBOR) Swap Rate \| Minimum \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative, fixed interest rate	1.30%
Term Loan F Due 2027 \| London Interbank Offered Rate (LIBOR) Swap Rate \| Maximum \| Interest Rate Swap
Debt Instrument [Line Items]
Derivative, fixed interest rate	3.85%
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Total borrowing capacity	$ 450,000,000
Long-term line of credit outstanding	$ 60,000,000	0
Debt Instrument, interest rate, stated percentage	1.50%
Letters of Credit Outstanding, Amount	$ 24,000,000	24,000,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 366,000,000	$ 426,000,000
Line of Credit \| Revolving Credit Facility \| London Interbank Offered Rate (LIBOR) \| Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Senior Notes \| Seven Percent Senior Notes Due 2029
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage	7.00%
Debt Instrument, Repaid, Principal	$ 360,000,000
Senior Notes \| Seven Percent Senior Notes Due 2029 \| Interest (expense) income
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost	$ 5,000,000
Secured Debt \| Term Loan F Notes Due 2027
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage	1.75%
Debt instrument, patronage distributions, percentage	0.90%
Debt instrument, patronage distributions, cash rebate, percentage	0.70%
Debt instrument, effective interest rate	5.69%	5.23%
Secured Debt \| Term Loan F Notes Due 2027 \| London Interbank Offered Rate (LIBOR) \| Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Secured Debt \| Term Loan A Due 2029
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated percentage	1.85%
Debt Instrument, Issued, Principal	$ 300,000,000
Secured Debt \| Term Loan A Due 2029 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%

Debt Instrument, Consolidated Total Leverage Ratio, Maximum

No definition available.

Name:	syl_DebtInstrumentConsolidatedTotalLeverageRatioMaximum
Namespace Prefix:	syl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Consolidated Total Leverage Ratio, Minimum

+ References

No definition available.

+ Details

Name:	syl_DebtInstrumentConsolidatedTotalLeverageRatioMinimum
Namespace Prefix:	syl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Consolidated Total, Maximum Leverage Ratio

+ References

No definition available.

+ Details

Name:	syl_DebtInstrumentConsolidatedTotalMaximumLeverageRatio
Namespace Prefix:	syl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Patronage Distributions, Cash Rebate, Percentage

+ References

No definition available.

+ Details

Name:	syl_DebtInstrumentPatronageDistributionsCashRebatePercentage
Namespace Prefix:	syl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Patronage Distributions, Percentage

+ References

No definition available.

+ Details

Name:	syl_DebtInstrumentPatronageDistributionsPercentage
Namespace Prefix:	syl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Income Tax Examination, Available Liquidity Required to Eliminate Limits on Maximum Annual Restricted Payments

+ References

No definition available.

+ Details

Name:	syl_IncomeTaxExaminationAvailableLiquidityRequiredToEliminateLimitsOnMaximumAnnualRestrictedPayments
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Income Tax Examination, Deposit Amount With Credit Agreement Agent to Eliminate Maximum Annual Restricted Payments

+ References

No definition available.

+ Details

Name:	syl_IncomeTaxExaminationDepositAmountWithCreditAgreementAgentToEliminateMaximumAnnualRestrictedPayments
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Income Tax Examination, Maximum Annual Restricted Payments

+ References

No definition available.

+ Details

Name:	syl_IncomeTaxExaminationMaximumAnnualRestrictedPayments
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Income Tax Examination, Maximum Annual Restricted Payments Increase

+ References

No definition available.

+ Details

Name:	syl_IncomeTaxExaminationMaximumAnnualRestrictedPaymentsIncrease
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Notional Amount, Interest Rate Swaps, Unwound

+ References

No definition available.

+ Details

Name:	syl_NotionalAmountInterestRateSwapsUnwound
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of Interest Rate Swaps Unwound

+ References

No definition available.

+ Details

Name:	syl_NumberOfInterestRateSwapsUnwound
Namespace Prefix:	syl_
Data Type:	xbrli:intItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of New Interest Rate Swaps

+ References

No definition available.

+ Details

Name:	syl_NumberOfNewInterestRateSwaps
Namespace Prefix:	syl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Swap Unwind, Cash Proceeds

+ References

No definition available.

+ Details

Name:	syl_SwapUnwindCashProceeds
Namespace Prefix:	syl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap-supplement_DebtInstrumentIssuedPrincipal
Namespace Prefix:	us-gaap-supplement_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap-supplement_DebtInstrumentRepaidPrincipal
Namespace Prefix:	us-gaap-supplement_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6036836-161870

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 https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ 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 (b)
-URI https://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 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ 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

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value as of the balance sheet date of all derivative assets designated as interest rate fair value hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

+ Details

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

- Definition

Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

+ References

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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

- Details

Name:	syl_DebtCovenantTermsAxis=syl_RatioBelow250Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_AdditionalDebtCovenantTermsAxis=syl_RatioEqualToOrAbove200Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DebtCovenantTermsAxis=syl_RatioBelow200Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DebtCovenantTermsAxis=syl_RatioEqualToOrAbove200Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DebtCovenantTermsAxis=syl_MaximumDepositAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DebtCovenantTermsAxis=syl_MinimumDepositAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DebtCovenantTermsAxis=syl_AvailableLiquidityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=syl_TermLoanADue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DerivativeMaturityDateAxis=syl_A2024To2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=syl_TermLoanFDue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=syl_DeferredChargesAndOtherAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DerivativeMaturityDateAxis=syl_A2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	syl_DerivativeMaturityDateAxis=syl_A2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLiborSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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_DebtInstrumentAxis=syl_SevenPercentSeniorNotesDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=syl_InterestExpenseIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=syl_TermLoanFNotesDue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: