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Fair Value Measurements - Fair Value Hierarchy (Details) (USD $)
In Millions, unless otherwise specified
Mar. 01, 2014
Jun. 01, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis $ 11.1 $ 10.8
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Available-for-sale Securities, Debt Securities, Current 11.1 10.8
Asset-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 0.7 0.8
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Available-for-sale Securities, Debt Securities, Current 0.7 0.8
Corporate Debt Securities [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 1.4 1.7
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Available-for-sale Securities, Debt Securities, Current 1.4 1.7
US Treasury and Government [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 7.4 5.1
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Available-for-sale Securities, Debt Securities, Current 7.4 5.1
Collateralized Mortgage Backed Securities [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale Debt Securities, Amortized Cost Basis 1.6 3.2
Financial Instruments Gross Unrealized Gains 0 0
Financial Instruments Gross Unrealized Loss 0 0
Available-for-sale Securities, Debt Securities, Current 1.6 3.2
Fair Value, Measurements, Recurring [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, Fair Value Disclosure 17.3 15.9
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0.3 0.3
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Deferred Compensation Plan Fair Value Disclosure 6.1 4.8
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Foreign Exchange Forward [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Currency Contract, Asset, Fair Value Disclosure 0.1 0.3
Foreign Currency Contracts, Liability, Fair Value Disclosure 0.3 0.3
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Asset-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale marketable securities 0.7 0.8
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale marketable securities 1.4 1.7
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale marketable securities 7.4 5.1
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale marketable securities $ 1.6 $ 3.2