Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Feb. 28, 2016	Feb. 22, 2015
Supplemental Cash Flow Elements [Abstract]
Expense (benefit) for cash components for repurchase premiums and make-whole amountsnguishment costs	$ (68.7)	$ 44.0
Extinguishment of debt, accrued interest	$ 6.3	$ 12.8

Reflects the difference between the fair value of payments made to legally extinguish a debt and its carrying value at that time. This item excludes the write-off of amounts previously capitalized as debt issuance costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration