Debt (Schedule of credit facilities) (Details) $ in Millions	12 Months Ended
	May 27, 2018 USD ($)
Line of Credit Facility [Line Items]
Facility Amount	$ 3,500.0
Borrowed Amount	300.0
Committed Credit Facilities [Member]
Line of Credit Facility [Line Items]
Facility Amount	3,000.0
Borrowed Amount	$ 100.0
Minimum fixed charge coverage ratio	2.5
Compliance with credit facility covenants	As of fiscal year end, we were in compliance with all credit facility covenants.
Line of Credit Expiring May 2022 [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 2,700.0
Borrowed Amount	$ 0.0
Expiration date of credit facility	May 31, 2022
Line of Credit Expiring June 2019 [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 200.0
Borrowed Amount	$ 100.0
Expiration date of credit facility	Jun. 30, 2019
Line of Credit Expiring September 2018 [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 100.0
Borrowed Amount	$ 0.0
Expiration date of credit facility	Sep. 12, 2018
Line of Credit Expiring Fourth Quarter 2018 [Member] | Bridge Loan [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 8,500.0
Debt Instrument Term	364 days
Uncommitted Credit Facility [Member]
Line of Credit Facility [Line Items]
Facility Amount	$ 500.0
Borrowed Amount	$ 200.0