Business Segment Information (Schedule of operating segment results) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 23, 2014	Nov. 24, 2013	Nov. 23, 2014	Nov. 24, 2013
Segment Reporting Information [Line Items]
Net sales	$ 4,712.2us-gaap_SalesRevenueGoodsNet	$ 4,875.7us-gaap_SalesRevenueGoodsNet	$ 8,980.6us-gaap_SalesRevenueGoodsNet	$ 9,248.4us-gaap_SalesRevenueGoodsNet
Operating profit	559.0us-gaap_OperatingIncomeLoss	870.1us-gaap_OperatingIncomeLoss	1,116.5us-gaap_OperatingIncomeLoss	1,604.9us-gaap_OperatingIncomeLoss
Restructuring, impairment, and other exit costs	214.6	0.7	228.6	3.5
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	4,712.2	4,875.7	8,980.6	9,248.4
Operating profit	846.6	919.7	1,537.1	1,731.3
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Restructuring, impairment, and other exit costs	214.6	0.7	228.6	3.5
Corporate Non-Segment [Member]
Segment Reporting Information [Line Items]
Operating profit	73.0	48.9	192.0	122.9
U.S. Retail [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	2,861.6	2,965.4	5,305.9	5,549.5
Operating profit	616.1	681.6	1,073.3	1,293.5
International [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,321.1	1,403.3	2,672.2	2,724.1
Operating profit	134.3	153.2	280.3	278.8
Convenience Stores and Foodservice [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	529.5	507.0	1,002.5	974.8
Operating profit	$ 96.2	$ 84.9	$ 183.5	$ 159.0

The net result for the period of deducting operating expenses from operating revenues.

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- Definition

The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items).

+ References

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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