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Derivative Financial Instruments - Hedging of Debt Portfolio (Details) - 6 months ended Dec. 30, 2017 € in Millions, £ in Millions, gal in Millions, $ in Millions | GBP (£) gal | EUR (€) | USD ($)
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Interest rate swap February 2018 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value |  |  | $ 500
Interest rate swap, April 2019 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value |  |  | 500
Interest rate swap October 2020 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value |  |  | 750
Interest rate swap July 2021 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value |  |  | $ 500
Hedging of foreign currency risk, July 2021 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value | £ | £ 234 |  |
Hedging of foreign currency risk, August 2021 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value | £ | £ 466 |  |
Hedging of foreign currency risk, June 2023 |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value | € |  | € 500 |
Fuel swaps |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional amount (in gallons) | gal | 44 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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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. + Details
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- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
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