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Company-Owned Life Insurance (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2025	Feb. 23, 2024	Feb. 24, 2023
Company Owned Life Insurance [Line Items]
Company-owned life insurance ("COLI")	$ 170.4	$ 166.9
Operating Expense [Member]
Company Owned Life Insurance [Line Items]
COLI Investment Income	9.7	10.5	$ 0.8
Whole Life [Member]
Company Owned Life Insurance [Line Items]
Company-owned life insurance ("COLI")	106.0	106.9
Variable Life [Member]
Company Owned Life Insurance [Line Items]
Company-owned life insurance ("COLI")	$ 64.4	$ 60.0

X

- Definition

This item represents investment income derived from investments in variable and whole life company owned life insurance policies.

+ References

No definition available.

+ Details

Name:	scs_ColiIncome
Namespace Prefix:	scs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

[Line Items] for Company Owned Life Insurance [Table]

+ References

No definition available.

+ Details

Name:	scs_CompanyOwnedLifeInsuranceLineItems
Namespace Prefix:	scs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_InvestmentTypeAxis=scs_WholeLifeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_VariableLifeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: