Retirement Benefits and Postemployment Benefits (Weighted-Average Assumptions 2) (Details)	12 Months Ended
	May 26, 2024	May 28, 2023	May 29, 2022
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.18%	4.39%	3.17%
Service cost effective rate	5.27%	4.57%	3.56%
Interest cost effective rate	5.06%	4.03%	2.42%
Rate of salary increases	4.20%	4.18%	4.39%
Expected long-term rate of return on plan assets	7.13%	6.70%	5.85%
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.19%	4.36%	3.03%
Service cost effective rate	5.15%	4.41%	3.34%
Interest cost effective rate	4.96%	3.80%	2.08%
Rate of salary increases	0.00%	0.00%	0.00%
Expected long-term rate of return on plan assets	7.34%	6.76%	6.09%
Postemployment Benefit Plans [Member]
Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	4.55%	3.62%	2.04%
Service cost effective rate	5.00%	3.69%	2.46%
Interest cost effective rate	4.61%	3.35%	1.48%
Rate of salary increases	4.46%	4.46%	4.46%
Expected long-term rate of return on plan assets	0.00%	0.00%	0.00%