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Fair Value Measurements - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Millions	Aug. 28, 2021	May 29, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	$ 7.7	$ 7.4
Unrealized Gain/(Loss)	0.3	0.3
Market Value	8.0	7.7
Mutual funds - fixed income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	7.2	6.9
Unrealized Gain/(Loss)	0.0	0.0
Market Value	7.2	6.9
Mutual funds - equity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	0.5	0.5
Unrealized Gain/(Loss)	0.3	0.3
Market Value	$ 0.8	$ 0.8

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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