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Commitments and Contingencies (Narrative) (Details) - Redfield Site [Member] $ in Millions | 6 Months Ended
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Jul. 29, 2017 USD ($)
Loss Contingencies [Line Items] |
Cumulative expenditures for both on-site and off-site remediation | $ 29.5
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation | 9.5
Reserve for anticipated future remediation activities for on-site remediation | 4.5
Reserve for anticipated future remediation activities for off-site remediation | $ 5.0
Liability for on-site remediation, discounted rate | 4.80%
On-site remediation liability, undiscounted basis | $ 14.5
Expected on-site remediation liability, year one | 0.5
Expected on-site remediation liability, year two | 0.1
Expected on-site remediation liability, year three | 0.1
Expected on-site remediation liability, year four | 0.1
Expected on-site remediation liability, year five | 0.1
Expected on-site remediation liability, thereafter | 13.6
Other Noncurrent Liabilities [Member] |
Loss Contingencies [Line Items] |
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation | 8.6
Other Current Liabilities [Member] |
Loss Contingencies [Line Items] |
Environmental Exit Costs, Assets Previously Disposed, Liability for Remediation | $ 0.9

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