Income Taxes (Schedule of deferred tax assets and liabilities) (Details) - USD ($) $ in Millions	May 31, 2020	May 26, 2019
Tax effects of temporary differences that give rise to deferred tax assets and liabilities [Abstract]
Accrued liabilities	$ 61.8	$ 50.9
Compensation and employee benefits	171.4	196.6
Pension	148.2	103.2
Tax credit carryforwards	12.5	7.3
Stock, partnership, and miscellaneous investments	80.2	104.2
Capital losses	65.9	73.1
Net operating losses	146.6	141.7
Other	87.0	71.3
Gross deferred tax assets	773.6	748.3
Valuation allowance	214.2	213.7
Net deferred tax assets	559.4	534.6
Brands	1,415.0	1,472.6
Fixed assets	378.3	377.8
Intangible assets	246.8	259.7
Tax lease transactions	21.5	23.9
Inventories	33.0	39.0
Stock, partnership, and miscellaneous investments	338.1	330.0
Unrealized hedges	22.4	27.9
Other	51.4	34.7
Gross deferred tax liabilities	2,506.5	2,565.6
Net deferred tax liability	$ 1,947.1	$ 2,031.0