Additional Financial Information (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	Aug. 30, 2020	May 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating lease right-of-use assets	$ 3,951.4	$ 3,969.2
Finance lease right-of-use assets	250.8	235.2
Total lease assets, net	4,202.2	4,204.4
Operating lease liabilities - current	163.5	160.6
Finance lease liabilities - current	5.9	5.7
Operating lease liabilities - non-current	4,264.3	4,276.3
Finance lease liabilities - non-current	387.3	368.4
Total lease liabilities	$ 4,821.0	$ 4,811.0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent