Income Taxes (Schedule of changes in total gross unrecognized tax benefit liabilities, excluding accrued interest) (Details) - USD ($) $ in Millions	12 Months Ended
May 27, 2018	May 28, 2017
Changes in total gross unrecognized tax benefit liabilities [Roll Forward]
Balance, beginning of year	$ 135.5	$ 176.5
Current year additions	24.1	27.2
Prior years additions	54.8	0.9
Prior years reductions	(7.9)	(47.9)
Prior years settlements	(3.9)	(9.6)
Lapses in statutes of limitations	(6.3)	(11.6)
Balance, end of year	$ 196.3	$ 135.5

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 740
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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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