Retirement Benefits and Postemployment Benefits (Schedule Of Allocation Of Plan Assets, Including Fair Value Hierarchy Levels And Weighted-Average Target Asset Allocations 1) (Details) - USD ($) $ in Millions	May 28, 2023	May 29, 2022	May 30, 2021
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	$ 5,778.6	$ 6,510.3	$ 7,460.2
Defined Benefit Pension Plans [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	796.7	1,132.0
Defined Benefit Pension Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	3,469.7	3,682.1
Defined Benefit Pension Plans [Member] | Real asset investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	92.8	159.8
Defined Benefit Pension Plans [Member] | Other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.1	0.1
Defined Benefit Pension Plans [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	295.3	133.9
Defined Benefit Pension Plans [Member] | Assets measured at net asset value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	1,124.0	1,402.4
Defined Benefit Pension Plans [Member] | Fair value measurement of pension plan assets in the fair value hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	4,654.6	5,107.9
Defined Benefit Pension Plans [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	2,269.6	2,875.5
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	278.3	623.4
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	1,603.4	1,958.7
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Real asset investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	92.8	159.8
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	295.1	133.6
Defined Benefit Pension Plans [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	2,350.6	2,166.0
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	484.1	442.3
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	1,866.3	1,723.4
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Real asset investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.2	0.3
Defined Benefit Pension Plans [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	34.4	66.4
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	34.3	66.3
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Real asset investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.1	0.1
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	456.0	479.2	$ 519.4
Other Postretirement Benefit Plans Gross Payments [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	113.3	120.8
Other Postretirement Benefit Plans Gross Payments [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	2.5	6.6
Other Postretirement Benefit Plans Gross Payments [Member] | Assets measured at net asset value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	340.2	351.8
Other Postretirement Benefit Plans Gross Payments [Member] | Fair value measurement of pension plan assets in the fair value hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	115.8	127.4
Other Postretirement Benefit Plans Gross Payments [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	115.8	127.4
Other Postretirement Benefit Plans Gross Payments [Member] | Level 1 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	113.3	120.8
Other Postretirement Benefit Plans Gross Payments [Member] | Level 1 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	2.5	6.6
Other Postretirement Benefit Plans Gross Payments [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member] | Level 2 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member] | Level 2 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member] | Level 3 [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	0.0	0.0
Other Postretirement Benefit Plans Gross Payments [Member] | Level 3 [Member] | Cash and accruals [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement of pension plan assets	$ 0.0	$ 0.0