Schedule II - Valuation of Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 28.8	$ 28.4	$ 24.3
Additions charged to expense, including translation amounts	25.9	23.9	26.7
Deductions for bad debt write-offs and amounts utilized for restructuring activities	(22.9)	(22.7)	(26.9)
Adjustments	1.4	(0.8)	4.3
Balance at end of year	33.2	28.8	28.4
Valuation Allowance for Deferred Tax Assets [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	213.7	176.0	231.8
Additions charged to expense, including translation amounts	4.2	(5.2)	2.4
Adjustments	(3.7)	42.9	(58.2)
Balance at end of year	214.2	213.7	176.0
Reserve for Restructuring and Other Exit Costs [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	36.5	66.8	85.0
Additions charged to expense, including translation amounts	(2.5)	11.6	40.3
Deductions for bad debt write-offs and amounts utilized for restructuring activities	(16.2)	(41.9)	(58.5)
Balance at end of year	17.8	36.5	66.8
Reserve for LIFO Valuation [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	213.5	213.2	209.1
Increase (decrease)	(11.4)	0.3	4.1
Balance at end of year	$ 202.1	$ 213.5	$ 213.2