Retirement And Postemployment Benefits (Components Of Net Periodic Benefit Expense(Income)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 23, 2025	Feb. 25, 2024	Feb. 23, 2025	Feb. 25, 2024
Defined Benefit Pension Plans [Member]
Components of Net Periodic Benefit Cost [Abstract]
Service cost	$ 12.9	$ 14.5	$ 38.8	$ 43.1
Interest cost	76.6	74.1	230.0	222.4
Expected return on plan assets	(104.9)	(104.5)	(314.9)	(313.4)
Amortization of losses (gains)	25.0	21.6	75.0	64.6
Amortization of prior service costs (credits)	0.3	0.4	1.0	1.3
Other adjustments	0.0	0.0	0.0	0.0
Curtailment gain			0.0	(3.4)
Net expense (income)	9.9	6.1	29.9	14.6
Other Postretirement Benefit Plans [Member]
Components of Net Periodic Benefit Cost [Abstract]
Service cost	1.0	1.1	3.2	3.5
Interest cost	5.3	5.3	15.9	16.0
Expected return on plan assets	(9.0)	(8.6)	(26.9)	(26.0)
Amortization of losses (gains)	(5.1)	(5.1)	(15.4)	(15.3)
Amortization of prior service costs (credits)	(5.5)	(5.5)	(16.6)	(16.4)
Other adjustments	0.0	0.0	0.0	0.0
Curtailment gain			0.0	0.0
Net expense (income)	(13.3)	(12.8)	(39.8)	(38.2)
Postemployment Benefit Plans [Member]
Components of Net Periodic Benefit Cost [Abstract]
Service cost	1.8	1.8	5.3	5.5
Interest cost	1.0	1.0	3.0	3.0
Expected return on plan assets	0.0	0.0	0.0	0.0
Amortization of losses (gains)	(0.3)	0.0	0.0	(0.1)
Amortization of prior service costs (credits)	(0.3)	0.1	(0.8)	0.4
Other adjustments	3.0	2.6	8.1	7.8
Curtailment gain			0.0	0.0
Net expense (income)	$ 5.2	$ 5.5	$ 15.6	$ 16.6