Financial Instruments, Risk Management Activities, and Fair Values (Schedule of offsetting assets and liabilities) (Details) - USD ($) $ in Millions		May 29, 2016	May 31, 2015
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		$ 40.7	$ 40.0
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	40.7	40.0
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	(12.6)	(13.8)
Cash Collateral Received, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	28.1	26.2
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(38.9)	(124.7)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(38.9)	(124.7)
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	12.6	13.8
Cash Collateral Pledged, Gross Amounts not Offset in the Balance Sheet	[3]	7.5	40.1
Net Amount	[5]	(18.8)	(70.8)
Commodity Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		4.4	10.1
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	4.4	10.1
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	(3.9)	(1.3)
Cash Collateral Received, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	0.5	8.8
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(22.2)	(59.4)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(22.2)	(59.4)
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	3.9	1.3
Cash Collateral Pledged, Gross Amounts not Offset in the Balance Sheet	[3]	7.5	40.1
Net Amount	[5]	(10.8)	(18.0)
Interest Rate Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		8.5	4.0
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	8.5	4.0
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Cash Collateral Received, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	8.5	4.0
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(3.0)	0.0
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(3.0)	0.0
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Cash Collateral Pledged, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[5]	(3.0)	0.0
Foreign Exchange Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		25.4	25.9
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	25.4	25.9
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	(8.7)	(12.5)
Cash Collateral Received, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	16.7	13.4
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(13.7)	(65.3)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(13.7)	(65.3)
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	8.7	12.5
Cash Collateral Pledged, Gross Amounts not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[5]	(5.0)	$ (52.8)
Equity Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		2.4
Gross Liabilities Offset in the Balance Sheet	[1]	0.0
Net Amounts of Assets	[2]	2.4
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	0.0
Cash Collateral Received, Gross Amounts not Offset in the Balance Sheet	[3]	0.0
Net Amount	[4]	2.4
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		0.0
Gross Assets Offset in the Balance Sheet	[1]	0.0
Net Amounts of Liabilities	[2]	0.0
Financial Instruments, Gross Amounts not Offset in the Balance Sheet	[3]	0.0
Cash Collateral Pledged, Gross Amounts not Offset in the Balance Sheet	[3]	0.0
Net Amount	[5]	$ 0.0

[1] Includes related collateral offset in our Consolidated Balance Sheets.

[2] N et fair value as recorded in our C onsolidated B alance S heets.

[3] Fair value of assets and liabilities reported on a gross basis in our Consolidated Balance Sheets.

[4] Fair value of assets t hat could be reported net in our C onsolidated B alance S heets.

[5] Fair value of liabilities that could be reported net in our Consolidated Balance Sheets.