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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

X

- Definition

This item represents the gross unrealized gains of debt and equity securities, derivatives, and long-term debt.

+ References

No definition available.

+ Details

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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

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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

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