Financial Instruments, Risk Management Activities, and Fair Values (Schedule of fair value measurement inputs) (Details) - USD ($) $ in Millions |
12 Months Ended |
May 28, 2017 |
May 29, 2016 |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
|
$ 30.8
|
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$ 40.7
|
|
Other Assets, Fair Value Disclosure |
|
319.1
|
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200.2
|
|
Total Assets, Fair Value Disclosure |
|
350.5
|
|
239.4
|
|
Derivative Liability, Fair Value |
|
(18.9)
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(38.9)
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Other Liabilities, Fair Value Disclosure |
|
0.0
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0.0
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Total Liabilities, Fair Value Disclosure |
|
(24.4)
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(44.4)
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Book value of long-lived assets |
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3,687.7
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3,743.6
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Long-Lived Assets [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
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43.7
|
[1] |
26.0
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[2] |
Other Liabilities, Fair Value Disclosure |
|
0.0
|
[1] |
0.0
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[2] |
Non-cash impairment charge of long-lived assets |
|
47.4
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11.4
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Book value of long-lived assets |
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91.1
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28.2
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Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
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17.0
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19.9
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Derivative Liability, Fair Value |
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(4.0)
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(15.2)
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Not Designated as Hedging [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
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14.4
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19.3
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Derivative Liability, Fair Value |
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(20.4)
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(29.2)
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Level 1 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
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9.9
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8.4
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Total Assets, Fair Value Disclosure |
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14.0
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11.0
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Other Liabilities, Fair Value Disclosure |
|
0.0
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0.0
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Total Liabilities, Fair Value Disclosure |
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(3.4)
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(0.6)
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Level 1 [Member] | Long-Lived Assets [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
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0.0
|
[1] |
0.0
|
[2] |
Other Liabilities, Fair Value Disclosure |
|
0.0
|
[1] |
0.0
|
[2] |
Level 1 [Member] | Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
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0.0
|
|
0.0
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Derivative Liability, Fair Value |
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0.0
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|
0.0
|
|
Level 1 [Member] | Not Designated as Hedging [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
|
4.1
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2.6
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Derivative Liability, Fair Value |
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(3.4)
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(0.6)
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Level 2 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
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309.2
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191.8
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Total Assets, Fair Value Disclosure |
|
336.5
|
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228.4
|
|
Other Liabilities, Fair Value Disclosure |
|
0.0
|
|
0.0
|
|
Total Liabilities, Fair Value Disclosure |
|
(21.0)
|
|
(43.8)
|
|
Level 2 [Member] | Long-Lived Assets [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Other Assets, Fair Value Disclosure |
|
43.7
|
[1] |
26.0
|
[2] |
Other Liabilities, Fair Value Disclosure |
|
0.0
|
[1] |
0.0
|
[2] |
Level 2 [Member] | Designated as Hedging Instrument [Member] |
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|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
|
|
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Derivative Asset, Fair Value |
|
17.0
|
|
19.9
|
|
Derivative Liability, Fair Value |
|
(4.0)
|
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(15.2)
|
|
Level 2 [Member] | Not Designated as Hedging [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
|
10.3
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16.7
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Derivative Liability, Fair Value |
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(17.0)
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(28.6)
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Level 3 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
|
0.0
|
|
0.0
|
|
Total Assets, Fair Value Disclosure |
|
0.0
|
|
0.0
|
|
Other Liabilities, Fair Value Disclosure |
|
0.0
|
|
0.0
|
|
Total Liabilities, Fair Value Disclosure |
|
0.0
|
|
0.0
|
|
Level 3 [Member] | Long-Lived Assets [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Other Assets, Fair Value Disclosure |
|
0.0
|
[1] |
0.0
|
[2] |
Other Liabilities, Fair Value Disclosure |
|
0.0
|
[1] |
0.0
|
[2] |
Level 3 [Member] | Designated as Hedging Instrument [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
|
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
|
0.0
|
|
0.0
|
|
Level 3 [Member] | Not Designated as Hedging [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
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0.0
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0.0
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Derivative Liability, Fair Value |
|
0.0
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|
0.0
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Marketable Investments [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
[3],[4] |
275.4
|
|
174.2
|
|
Other Liabilities, Fair Value Disclosure |
[3],[4] |
0.0
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|
0.0
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Marketable Investments [Member] | Level 1 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
[3],[4] |
9.9
|
|
8.4
|
|
Other Liabilities, Fair Value Disclosure |
[3],[4] |
0.0
|
|
0.0
|
|
Marketable Investments [Member] | Level 2 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Other Assets, Fair Value Disclosure |
[3],[4] |
265.5
|
|
165.8
|
|
Other Liabilities, Fair Value Disclosure |
[3],[4] |
0.0
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|
0.0
|
|
Marketable Investments [Member] | Level 3 [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Other Assets, Fair Value Disclosure |
[3],[4] |
0.0
|
|
0.0
|
|
Other Liabilities, Fair Value Disclosure |
[3],[4] |
0.0
|
|
0.0
|
|
Interest Rate Contracts [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Derivative Asset, Fair Value |
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0.9
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|
8.5
|
|
Derivative Liability, Fair Value |
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(0.5)
|
|
(3.0)
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|
Interest Rate Contracts [Member] | Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[4],[5] |
0.7
|
|
7.7
|
|
Derivative Liability, Fair Value |
[4],[5] |
(0.4)
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|
(3.0)
|
|
Interest Rate Contracts [Member] | Level 1 [Member] | Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Derivative Asset, Fair Value |
[4],[5] |
0.0
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|
0.0
|
|
Derivative Liability, Fair Value |
[4],[5] |
0.0
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|
0.0
|
|
Interest Rate Contracts [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[4],[5] |
0.7
|
|
7.7
|
|
Derivative Liability, Fair Value |
[4],[5] |
(0.4)
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|
(3.0)
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|
Interest Rate Contracts [Member] | Level 3 [Member] | Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[4],[5] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[4],[5] |
0.0
|
|
0.0
|
|
Foreign Exchange Contracts [Member] |
|
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
|
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Derivative Asset, Fair Value |
|
16.5
|
|
25.4
|
|
Derivative Liability, Fair Value |
|
(10.2)
|
|
(13.7)
|
|
Foreign Exchange Contracts [Member] | Designated as Hedging Instrument [Member] |
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[6],[7] |
16.3
|
|
12.2
|
|
Derivative Liability, Fair Value |
[6],[7] |
(3.6)
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|
(12.2)
|
|
Foreign Exchange Contracts [Member] | Not Designated as Hedging [Member] |
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[6],[7] |
0.2
|
|
13.2
|
|
Derivative Liability, Fair Value |
[6],[7] |
(6.6)
|
|
(1.5)
|
|
Foreign Exchange Contracts [Member] | Level 1 [Member] | Designated as Hedging Instrument [Member] |
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|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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Derivative Asset, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Foreign Exchange Contracts [Member] | Level 1 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
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|
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Derivative Asset, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Foreign Exchange Contracts [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member] |
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
|
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Derivative Asset, Fair Value |
[6],[7] |
16.3
|
|
12.2
|
|
Derivative Liability, Fair Value |
[6],[7] |
(3.6)
|
|
(12.2)
|
|
Foreign Exchange Contracts [Member] | Level 2 [Member] | Not Designated as Hedging [Member] |
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Derivative Asset, Fair Value |
[6],[7] |
0.2
|
|
13.2
|
|
Derivative Liability, Fair Value |
[6],[7] |
(6.6)
|
|
(1.5)
|
|
Foreign Exchange Contracts [Member] | Level 3 [Member] | Designated as Hedging Instrument [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
|
|
Derivative Asset, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Foreign Exchange Contracts [Member] | Level 3 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
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|
|
Derivative Asset, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[6],[7] |
0.0
|
|
0.0
|
|
Commodity Contracts [Member] |
|
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
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Derivative Asset, Fair Value |
|
11.5
|
|
4.4
|
|
Derivative Liability, Fair Value |
|
(8.2)
|
|
(22.2)
|
|
Commodity Contracts [Member] | Not Designated as Hedging [Member] |
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Derivative Asset, Fair Value |
[7],[8] |
11.5
|
|
4.3
|
|
Derivative Liability, Fair Value |
[7],[8] |
(8.2)
|
|
(22.2)
|
|
Commodity Contracts [Member] | Level 1 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
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Derivative Asset, Fair Value |
[7],[8] |
4.1
|
|
2.6
|
|
Derivative Liability, Fair Value |
[7],[8] |
(3.4)
|
|
(0.6)
|
|
Commodity Contracts [Member] | Level 2 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
|
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|
Derivative Asset, Fair Value |
[7],[8] |
7.4
|
|
1.7
|
|
Derivative Liability, Fair Value |
[7],[8] |
(4.8)
|
|
(21.6)
|
|
Commodity Contracts [Member] | Level 3 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
|
|
|
Derivative Asset, Fair Value |
[7],[8] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[7],[8] |
0.0
|
|
0.0
|
|
Grain Contracts [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
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|
|
|
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Derivative Asset, Fair Value |
[7],[8] |
2.7
|
|
1.8
|
|
Derivative Liability, Fair Value |
[7],[8] |
(5.6)
|
|
(5.5)
|
|
Grain Contracts [Member] | Level 1 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
|
|
Derivative Asset, Fair Value |
[7],[8] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[7],[8] |
0.0
|
|
0.0
|
|
Grain Contracts [Member] | Level 2 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
|
|
Derivative Asset, Fair Value |
[7],[8] |
2.7
|
|
1.8
|
|
Derivative Liability, Fair Value |
[7],[8] |
(5.6)
|
|
(5.5)
|
|
Grain Contracts [Member] | Level 3 [Member] | Not Designated as Hedging [Member] |
|
|
|
|
|
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |
|
|
|
|
|
Derivative Asset, Fair Value |
[7],[8] |
0.0
|
|
0.0
|
|
Derivative Liability, Fair Value |
[7],[8] |
$ 0.0
|
|
$ 0.0
|
|
|
|