PRE-TAX INCOME AND INCOME TAXES - Schedule of the Tax Effect of Temporary Differences and Carryforwards (Details) - USD ($) $ in Millions	May 31, 2020	May 26, 2019
Assets
Inventory	$ 19.5	$ 15.2
Accrued expenses	13.4	11.8
Compensation related liabilities	36.3	35.9
Pension and other postretirement benefits	35.2	54.6
Lease liabilities	61.3
Other liabilities that will give rise to future tax deductions	88.1	123.5
Net capital and operating loss carryforwards	753.4	766.5
Federal credits	17.5	18.0
Other	52.7	37.6
Gross deferred tax assets	1,077.4	1,063.1
Less: Valuation allowance	(728.3)	(738.1)
Net deferred taxes	349.1	325.0
Liabilities
Property, plant and equipment	258.4	240.7
Goodwill, trademarks and other intangible assets	1,108.4	1,187.0
Right-of-use assets	51.0
Investment in unconsolidated subsidiaries	196.2	185.4
Other	31.8	24.0
Gross deferred tax liabilities	1,645.8	1,637.1
Net deferred taxes	$ 1,645.8	$ 1,637.1