Fair Value Narrative (Details) - USD ($) $ in Millions	6 Months Ended
Fair Value Narrative (Details) - USD ($) $ in Millions	Aug. 29, 2025	Feb. 28, 2025	Aug. 23, 2024	Feb. 23, 2024
Fair Value Disclosures [Abstract]
Debt, Long-term and Short-term, Combined Amount	$ 447.4	$ 447.1
Long-term Debt, Fair Value	443.7	432.8
Short-Term Investments	41.1	41.6
Short-Term Investments, Cost Basis	40.4
Unrealized Gain (Loss) on Investments	0.7
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	10.4
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	30.7
Fair Value, Option, Quantitative Disclosures [Line Items]
Restricted Cash	7.3	7.5	$ 7.3	$ 7.3
Fair Value, Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Cash and cash equivalents	216.8	346.3
Restricted Cash	7.3	7.5
Assets, Fair Value Disclosure	270.9	399.0
Liabilities, Fair Value Disclosure	(0.3)	(1.4)
Fair Value, Recurring [Member] \| Debt Security, Corporate, US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	17.6	18.0
Fair Value, Recurring [Member] \| Debt Security, Corporate, Non-US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	5.2	5.7
Fair Value, Recurring [Member] \| Asset-backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	9.8	8.6
Fair Value, Recurring [Member] \| US Treasury Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	8.5	9.3
Fair Value, Recurring [Member] \| Foreign Exchange Contract [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Foreign exchange forward contracts	3.0	0.8
Foreign exchange forward contracts	(0.3)	(1.4)
Fair Value, Recurring [Member] \| Auction Rate Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Auction rate security	2.7	2.8
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Cash and cash equivalents	216.8	346.3
Restricted Cash	7.3	7.5
Assets, Fair Value Disclosure	232.6	363.1
Liabilities, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| Debt Security, Corporate, US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| Debt Security, Corporate, Non-US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| Asset-backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| US Treasury Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	8.5	9.3
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| Foreign Exchange Contract [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Foreign exchange forward contracts	0.0	0.0
Foreign exchange forward contracts	0.0	0.0
Fair Value, Inputs, Level 1 \| Fair Value, Recurring [Member] \| Auction Rate Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Auction rate security	0.0	0.0
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Cash and cash equivalents	0.0	0.0
Restricted Cash	0.0	0.0
Assets, Fair Value Disclosure	35.6	33.1
Liabilities, Fair Value Disclosure	(0.3)	(1.4)
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| Debt Security, Corporate, US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	17.6	18.0
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| Debt Security, Corporate, Non-US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	5.2	5.7
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| Asset-backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	9.8	8.6
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| US Treasury Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| Foreign Exchange Contract [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Foreign exchange forward contracts	3.0	0.8
Foreign exchange forward contracts	(0.3)	(1.4)
Fair Value, Inputs, Level 2 \| Fair Value, Recurring [Member] \| Auction Rate Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Auction rate security	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Cash and cash equivalents	0.0	0.0
Restricted Cash	0.0	0.0
Assets, Fair Value Disclosure	2.7	2.8
Liabilities, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Debt Security, Corporate, US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Debt Security, Corporate, Non-US
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Asset-backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| US Treasury Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Foreign Exchange Contract [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Foreign exchange forward contracts	0.0	0.0
Foreign exchange forward contracts	0.0	0.0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Recurring [Member] \| Auction Rate Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Auction rate security	$ 2.7	$ 2.8

STEELCASE INC 10-Q