Leases (Schedule of supplemental information to Consolidated Balance Sheet related to operating leases) (Details) $ in Millions	Feb. 23, 2020 USD ($)
Lessee Disclosure [Abstract]
Right of use assets	$ 395.8	[1]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Current lease liabilities	$ 109.8
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities
Non-current lease liabilities	$ 300.8
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities

[1] Net of accumulated amortization