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Fair Value of Financial Assets - Schedule of Unrealized Gain (Loss) on Investments (Details) (USD $) In Millions, unless otherwise specified | May 31, 2014 | Jun. 01, 2013
--- | --- | ---
Gain (Loss) on Investments |  |
Cost | $ 11.1 | $ 10.8
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Market Value | 11.1 | 10.8
Asset-Backed Securities |  |
Gain (Loss) on Investments |  |
Cost | 0.4 | 0.8
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Market Value | 0.4 | 0.8
Corporate Debt Securities |  |
Gain (Loss) on Investments |  |
Cost | 1.2 | 1.7
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Market Value | 1.2 | 1.7
Government Obligations |  |
Gain (Loss) on Investments |  |
Cost | 7.9 | 5.1
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Market Value | 7.9 | 5.1
Mortgage-Backed Securities |  |
Gain (Loss) on Investments |  |
Cost | 1.6 | 3.2
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Market Value | $ 1.6 | $ 3.2

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- Definition This item represents the gross unrealized losses of debt and equity securities, derivatives, and long-term debt. + References No definition available. + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of investments in debt securities classified as available-for-sale, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 + Details
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