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Fair Value of Financial Assets - Schedule of Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Millions | May. 30, 2015 | May. 31, 2014
--- | --- | ---
Gain (Loss) on Investments |  |
Cost | $ 5.7 | $ 11.1
Unrealized Gain | 0.0 | 0.0
Unrealized Loss | 0.0 | 0.0
Market Value | 5.7 | 11.1
Asset-Backed Securities |  |
Gain (Loss) on Investments |  |
Cost | 0.2 | 0.4
Unrealized Gain | 0.0 | 0.0
Unrealized Loss | 0.0 | 0.0
Market Value | 0.2 | 0.4
Corporate Debt Securities |  |
Gain (Loss) on Investments |  |
Cost | 0.6 | 1.2
Unrealized Gain | 0.0 | 0.0
Unrealized Loss | 0.0 | 0.0
Market Value | 0.6 | 1.2
Government Obligations |  |
Gain (Loss) on Investments |  |
Cost | 0.5 | 7.9
Unrealized Gain | 0.0 | 0.0
Unrealized Loss | 0.0 | 0.0
Market Value | 0.5 | 7.9
Mortgage-Backed Securities |  |
Gain (Loss) on Investments |  |
Cost | 4.4 | 1.6
Unrealized Gain | 0.0 | 0.0
Unrealized Loss | 0.0 | 0.0
Market Value | $ 4.4 | $ 1.6

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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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