Note 17 - Pension and Postretirement Benefits - Schedule of Changes in Benefit Obligations and Plan Asset (Details) - USD ($) $ in Millions	12 Months Ended
	May 29, 2022	May 30, 2021	May 31, 2020
Fair value of plan assets at end of year	$ 3,294.7
Pension Plan [Member]
Benefit obligation at beginning of year	3,739.2	$ 3,872.5
Service cost	8.7	11.6	$ 11.5
Interest cost	83.3	86.8	118.4
Amendments	3.7	0.0
Actuarial gain	(503.1)	(37.4)
Plan settlements	0.0	0.0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.0	0.0
Benefits paid	(198.3)	(196.8)
Currency	(0.9)	2.5
Benefit obligation at end of year	3,132.6	3,739.2	3,872.5
Fair value of plan assets at beginning of year	3,848.8	3,820.4
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(366.1)	194.6
Employer contributions	11.5	27.6
Plan settlements	0.0	0.0
Benefits paid	(198.4)	(196.8)
Currency	(1.1)	3.0
Fair value of plan assets at end of year	3,294.7	3,848.8	3,820.4
Other Postretirement Benefits Plan [Member]
Benefit obligation at beginning of year	81.5	89.8
Service cost	0.2	0.2	0.1
Interest cost	1.3	1.5	2.6
Amendments	0.0	0.0
Actuarial gain	(9.5)	(2.3)
Plan settlements	0.0	(0.3)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0.0	0.0
Benefits paid	(8.2)	(8.5)
Currency	(0.5)	1.1
Benefit obligation at end of year	64.8	81.5	89.8
Fair value of plan assets at beginning of year	3.3	3.4
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0.1	0.2
Employer contributions	8.2	8.5
Plan settlements	0.0	(0.3)
Benefits paid	(8.2)	(8.5)
Currency	0.0	0.0
Fair value of plan assets at end of year	$ 3.4	$ 3.3	$ 3.4