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Financing Arrangements - Additional Information (Detail)		3 Months Ended	12 Months Ended
	Jul. 17, 2017 USD ($) Extension	Jul. 28, 2017 USD ($)	Apr. 28, 2017 USD ($)
Debt Instrument [Line Items]
Sale leaseback transaction, remaining financing obligations		$ 130,000,000	$ 130,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, amount	$ 1,000,000,000
Credit facility, date expiry	Dec. 10, 2021
Credit facility, increase in facility	$ 300,000,000
Credit facility, number of extensions | Extension	2
Credit facility, extensions period	1 year
Credit facility, amounts drawn		0	0
Revolving Credit Facility | Letter Of Credit Sub Facility
Debt Instrument [Line Items]
Credit facility, amount	$ 50,000,000
Commercial Paper
Debt Instrument [Line Items]
Notes issued, principal amount		$ 895,000,000	$ 500,000,000
Weighted-average interest rate		1.45%	1.26%
Commercial Paper | Maximum
Debt Instrument [Line Items]
Notes issued, principal amount	$ 1,000,000,000
Debt instrument maturity period	397 days	56 days	38 days
Commercial Paper | Minimum
Debt Instrument [Line Items]
Debt instrument maturity period		13 days	7 days
Senior Notes
Debt Instrument [Line Items]
Notes issued, principal amount		$ 1,500,000,000	$ 1,500,000,000
Senior Notes | Due June 2021
Debt Instrument [Line Items]
Notes issued, principal amount		$ 500,000,000	500,000,000
Notes issued, interest rate		3.375%
Senior Notes | Due December 2017
Debt Instrument [Line Items]
Notes issued, principal amount		$ 750,000,000	750,000,000
Notes issued, interest rate		2.00%
Senior Notes | Due December 2022
Debt Instrument [Line Items]
Notes issued, principal amount		$ 250,000,000	$ 250,000,000
Notes issued, interest rate		3.25%

X

- Definition

Amount potentially available for additional borrowing on the Line of Credit Facility.

+ References

No definition available.

+ Details

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- Definition

Number of extensions potentially available to the borrower under the line of credit facility.

+ References

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- Definition

Term of extension period for line of credit facility.

+ 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

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X

- Definition

Contractual interest rate for funds borrowed, under the debt 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(a)(1))
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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

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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- Definition

The liability due as of the balance sheet date for leasebacks accounted for using the deposit method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 40
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- Definition

Weighted average interest rate of short-term debt outstanding calculated at point in time.

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