Debt (Narrative) (Details) - USD ($)	12 Months Ended
May 28, 2017	Apr. 10, 2017
Senior Notes
Debt Instruments [Line Items]
Maximum range of interest rate adjustment on funds borrowed (percentage)	2.00%
3.850% senior notes due May 2027 \| Senior Notes
Debt Instruments [Line Items]
Face amount of debt		$ 500,000,000.0
Interest rate of debt (percentage)		3.85%
Discount and issuance costs		$ 4,400,000
Redemption price, percentage	101.00%
6.800% senior notes due October 2037 \| Senior Notes
Debt Instruments [Line Items]
Face amount of debt	$ 300,000,000.0
Interest rate of debt (percentage)	6.80%
Maturity date of debt	Oct. 01, 2037
Revolving Credit Agreement \| Revolving Credit Facility
Debt Instruments [Line Items]
Maximum borrowing available under the credit facility	$ 750,000,000.0
Total debt to total capitalization ratio	0.75
Base interest rate percentage of revolving credit facility in addition to federal funds rate (percentage)	0.50%
Libor \| Revolving Credit Agreement \| Revolving Credit Facility
Debt Instruments [Line Items]
Applicable interest rate assuming a BBB equivalent credit rating level (percentage)	1.10%
Base Rate Loans \| Revolving Credit Agreement \| Revolving Credit Facility
Debt Instruments [Line Items]
Applicable interest rate assuming a BBB equivalent credit rating level (percentage)	0.10%
Revolving Credit Facility \| Revolving Credit Agreement
Debt Instruments [Line Items]
Outstanding balance of credit agreement	$ 0
Revolving Credit Facility \| Eurodollar \| Revolving Credit Agreement
Debt Instruments [Line Items]
Debt instrument, basis spread on variable rate	1.00%

Applicable interest rate assuming a BBB equivalent credit rating level

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- Definition

Base interest rate percentage of revolving credit facility in addition to federal funds rate

+ References

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- Definition

Debt instrument, maximum range of interest rate adjustment

+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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-Name Accounting Standards Codification
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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- Definition

Indebtedness divided by net capital.

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