Fair value measurements - assets and liabilities on a recurring basis (Details) (USD $)	Mar. 28, 2015	Jun. 28, 2014	Nov. 08, 2013
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Senior Notes	$ 3,890,200,000us-gaap_SeniorNotes	$ 2,294,000,000us-gaap_SeniorNotes	$ 2,300,000,000us-gaap_SeniorNotes
Assets:
Investment securities	21,800,000us-gaap_InvestmentsFairValueDisclosure	20,700,000us-gaap_InvestmentsFairValueDisclosure
Foreign currency forward contracts	4,900,000	3,100,000
Funds associated with Israeli post employment benefits	16,600,000	19,300,000
Total assets	43,300,000us-gaap_AssetsFairValueDisclosure	43,100,000us-gaap_AssetsFairValueDisclosure
Liabilities:
Contingent consideration	12,400,000	17,400,000
Interest rate swap agreements	5,000,000	8,300,000
Foreign currency forward contracts	8,100,000	800,000
Total liabilities	25,500,000us-gaap_LiabilitiesFairValueDisclosure	26,500,000us-gaap_LiabilitiesFairValueDisclosure
Fair Value, Inputs, Level 1 [Member]
Assets:
Investment securities	21,800,000	20,700,000
Foreign currency forward contracts	0	0
Funds associated with Israeli post employment benefits	0	0
Total assets	21,800,000	20,700,000
Liabilities:
Contingent consideration	0	0
Interest rate swap agreements	0	0
Foreign currency forward contracts	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Investment securities	0	0
Foreign currency forward contracts	4,900,000	3,100,000
Funds associated with Israeli post employment benefits	16,600,000	19,300,000
Total assets	21,500,000	22,400,000
Liabilities:
Contingent consideration	0	0
Interest rate swap agreements	5,000,000	8,300,000
Foreign currency forward contracts	8,100,000	800,000
Total liabilities	13,100,000	9,100,000
Fair Value, Inputs, Level 3 [Member]
Assets:
Investment securities	0	0
Foreign currency forward contracts	0	0
Funds associated with Israeli post employment benefits	0	0
Total assets	0	0
Liabilities:
Contingent consideration	12,400,000	17,400,000
Interest rate swap agreements	0	0
Foreign currency forward contracts	0	0
Total liabilities	12,400,000	17,400,000
Senior Notes and Public Bond [Domain] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Senior Notes	3,900,000,000
Debt Instrument, Fair Value Disclosure	4,100,000,000	2,400,000,000
Senior Notes and Public Bond [Domain] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Senior Notes		$ 2,300,000,000

Funds Associated With Israeli Post Employment Benefits Fair Value Disclosure

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

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-Section 35

-Paragraph 1

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

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- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594

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-Name Accounting Standards Codification

-Glossary Trading Securities

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7

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Fair value of financial and nonfinancial obligations.

+ References

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Topic 944

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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