Supplemental Balance Sheet Information (Schedule of Other Non-current Liabilities) (Details) - USD ($) $ in Thousands	Feb. 27, 2021	Feb. 29, 2020
Working Capital [Abstract]
Deferred benefit from New Markets Tax Credit transactions	$ 15,717	$ 15,717
Retirement plan obligations	7,730	8,294
Deferred compensation plan	13,507	8,452
Deferred tax liabilities	8,310	7,940
Deferred payroll taxes	6,789	0
Other	16,430	16,459
Total other non-current liabilities	$ 68,483	$ 56,862

Additional Other Liabilities, Noncurrent

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- Definition

Deferred Payroll Taxes Long-Term (CARES Act)

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Working Capital [Abstract]

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- Definition

The noncurrent portion of the reserve for accumulated deferred investment tax credits as of the balance sheet date. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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Amount of expenses incurred but not yet paid classified as other, due after one year or the normal operating cycle, if longer.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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