Financial Instruments, Risk Management Activities, and Fair Values (Schedule of offsetting assets and liabilities) (Details) - USD ($) $ in Millions		May 28, 2017	May 29, 2016
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		$ 30.8	$ 40.7
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	30.8	40.7
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	(14.9)	(12.6)
Cash Collateral Received, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	15.9	28.1
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(18.9)	(38.9)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(18.9)	(38.9)
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	14.9	12.6
Cash Collateral Pledged, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	7.5
Net Amount	[5]	(4.0)	(18.8)
Commodity Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		11.5	4.4
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	11.5	4.4
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	(7.2)	(3.9)
Cash Collateral Received, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	4.3	0.5
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(8.2)	(22.2)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(8.2)	(22.2)
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	7.2	3.9
Cash Collateral Pledged, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	7.5
Net Amount	[5]	(1.0)	(10.8)
Interest Rate Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		0.9	8.5
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	0.9	8.5
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	(0.5)	0.0
Cash Collateral Received, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	0.4	8.5
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(0.5)	(3.0)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(0.5)	(3.0)
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	0.5	0.0
Cash Collateral Pledged, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[5]	0.0	(3.0)
Foreign Exchange Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		16.5	25.4
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	16.5	25.4
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	(7.2)	(8.7)
Cash Collateral Received, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[4]	9.3	16.7
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		(10.2)	(13.7)
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	(10.2)	(13.7)
Financial Instruments, Gross Amounts Not Offset in the Balance Sheet	[3]	7.2	8.7
Cash Collateral Pledged, Gross Amounts Not Offset in the Balance Sheet	[3]	0.0	0.0
Net Amount	[5]	(3.0)	(5.0)
Equity Contracts [Member]
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets		1.9	2.4
Gross Liabilities Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Assets	[2]	1.9	2.4
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]	1.9	2.4
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities		0.0	0.0
Gross Assets Offset in the Balance Sheet	[1]	0.0	0.0
Net Amounts of Liabilities	[2]	0.0	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]	$ 0.0	$ 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.