Retirement Benefits and Postemployment Benefits (Amounts Recognized In AOCI) (Details) - USD ($) $ in Millions	May 28, 2023	May 29, 2022
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ (1,670.6)	$ (1,513.4)
Prior service credits	96.4	110.3
Amounts recorded in accumulated other comprehensive loss	(1,574.2)	(1,403.1)
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	(1,859.7)	(1,720.3)
Prior service credits	(4.8)	(7.6)
Amounts recorded in accumulated other comprehensive loss	(1,864.5)	(1,727.9)
Other Postretirement Benefit Plans Gross Payments [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	186.9	208.5
Prior service credits	102.3	118.9
Amounts recorded in accumulated other comprehensive loss	289.2	327.4
Postemployment Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	2.2	(1.6)
Prior service credits	(1.1)	(1.0)
Amounts recorded in accumulated other comprehensive loss	$ 1.1	$ (2.6)