Supplemental Information (Schedule Of Certain Consolidated Balance Sheet accounts) (Details) - USD ($) $ in Millions	May 28, 2023	May 29, 2022	May 30, 2021	May 31, 2020
Receivables [Abstract]
Customers	$ 1,710.1	$ 1,720.4
Less allowance for doubtful accounts	(26.9)	(28.3)
Total	1,683.2	1,692.1
Inventories [Abstract]
Finished goods	2,066.9	1,634.7
Raw materials and packaging	572.2	532.0
Grain	133.8	164.0
Excess of FIFO over LIFO cost	(600.9)	(463.4)
Total	2,172.0	1,867.3
LIFO Inventory Amount	1,477.5	1,127.1
Prepaid Expenses and Other Current Assets [Abstract]
Marketable investments	117.2	249.8
Other receivables	285.7	182.8
Prepaid expenses	244.4	213.5
Derivative receivables	45.1	86.1
Grain contracts	2.3	28.7
Miscellaneous	41.0	41.2
Total	735.7	802.1
Assets held for sale:
Goodwill	0.0	130.0
Inventories	0.0	22.9
Equipment	0.0	6.0
Total	0.0	158.9
Land, Buildings and Equipment [Abstract]
Equipment	6,672.2	6,491.7
Buildings	2,569.3	2,444.8
Construction in progress	746.7	492.8
Capitalized software	514.8	717.8
Land	56.5	55.1
Total land, buildings, and equipment	10,569.6	10,210.3
Less accumulated depreciation	(6,933.4)	(6,816.5)
Total	3,636.2	3,393.8
Other Assets [Abstract]
Investments in and advances to joint ventures	462.0	513.8
Right of use operating lease assets	$ 340.0	$ 336.8
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Total	Total
Pension assets	$ 51.8	$ 52.6
Life insurance	15.8	17.5
Miscellaneous	290.7	307.4
Total	1,160.3	1,228.1
Other Current Liabilities [Abstract]
Accrued trade and consumer promotions	454.3	474.4
Accrued payroll	426.6	435.6
Accrued taxes	80.9	31.4
Restructuring and other exit costs reserve	47.7	36.8	$ 148.8	$ 17.8
Current portion of operating lease liabilities	101.9	$ 106.7
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]		Total
Accrued interest, including interest rate swaps	83.1	$ 70.1
Derivative payable, primarily commodity-related	34.0	19.9
Dividends payable	23.1	25.3
Grains contracts	11.8	3.0
Miscellaneous	337.3	348.8
Total	1,600.7	1,552.0
Other Noncurrent Liabilities [Abstract]
Accrued compensation and benefits, including obligations for underfunded other postretirement benefit and postemployment benefit plans	509.6	360.8
Non-current portion of operating lease liabilities	$ 257.0	$ 248.3
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total	Total
Accrued taxes	$ 245.1	$ 233.0
Miscellaneous	128.3	87.0
Total	1,140.0	929.1
Buildings [Member]
Land, Buildings and Equipment [Abstract]
Finance Lease, Right-of-Use Asset	0.3	0.3
Equipment [Member]
Land, Buildings and Equipment [Abstract]
Finance Lease, Right-of-Use Asset	$ 9.8	$ 7.8