Derivative Financial Instruments - Hedging of Debt Portfolio (Details) - 9 months ended Mar. 30, 2019 £ in Millions, kr in Millions, gal in Millions, $ in Millions, $ in Millions	GBP (£) gal	EUR (€)	USD ($)	CAD ($)	SEK (kr)
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
Interest rate swaps, June 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | €		€ 500,000,000.0
Interest rate swap, March 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value			500
Hedging of foreign currency risk, SEK, January 2019 to April 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | kr					kr 321
Hedging of foreign currency risk, GBP, Maturing January 2019 to October 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | £	£ 21
Hedging of foreign currency risk, USD, Maturing January 2019 to December 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value			$ 1
Hedging of foreign currency risk, CAD, June 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value				$ 300
Hedging of foreign currency risk, GBP, July 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | £	234
Hedging of foreign currency risk, GBP, August 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | £	£ 466
Hedging of foreign currency risk, Euro, June 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Value | €		€ 500,000,000
Fuel swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount (in gallons) | gal	57