Financial Instruments, Risk Management Activities, and Fair Values (Schedule of gains and losses on hedges) (Details) - USD ($) $ in Millions		12 Months Ended
		May 27, 2018	May 28, 2017
Cash Flow Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (OCI)	[1]	$ (65.1)	$ 70.3
Amount of net gain (loss) reclassified from AOCI into earnings	[1],[2]	15.1	28.8
Amount of net gain (loss) recognized in earnings	[3]	(2.9)	0.7
Fair Value Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	(3.4)	4.3
Not Designated as Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	38.4	9.2
Interest Rate Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (OCI)	[1]	(50.5)	24.0
Amount of net gain (loss) reclassified from AOCI into earnings	[1],[2]	19.3	(5.0)
Amount of net gain (loss) recognized in earnings	[3]	(2.6)	0.1
Interest Rate Contracts [Member] | Fair Value Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	(3.4)	4.3
Interest Rate Contracts [Member] | Not Designated as Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	0.0	0.0
Foreign Exchange Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (OCI)	[1]	(14.6)	46.3
Amount of net gain (loss) reclassified from AOCI into earnings	[1],[2]	(4.2)	33.8
Amount of net gain (loss) recognized in earnings	[3]	(0.3)	0.6
Foreign Exchange Contracts [Member] | Fair Value Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	0.0	0.0
Foreign Exchange Contracts [Member] | Not Designated as Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	(2.8)	7.6
Equity Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (OCI)	[1]	0.0	0.0
Amount of net gain (loss) reclassified from AOCI into earnings	[1],[2]	0.0	0.0
Amount of net gain (loss) recognized in earnings	[3]	0.0	0.0
Equity Contracts [Member] | Fair Value Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	0.0	0.0
Equity Contracts [Member] | Not Designated as Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	14.3	17.8
Commodity Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of gain (loss) recognized in other comprehensive income (OCI)	[1]	0.0	0.0
Amount of net gain (loss) reclassified from AOCI into earnings	[1],[2]	0.0	0.0
Amount of net gain (loss) recognized in earnings	[3]	0.0	0.0
Commodity Contracts [Member] | Fair Value Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	0.0	0.0
Commodity Contracts [Member] | Not Designated as Hedging [Member]
Derivative Instruments Gain (Loss) [Line Items]
Amount of net gain (loss) recognized in earnings	[4]	$ 26.9	$ (16.2)

[1] Effective portion.

[2] Gain (loss) reclassified from AOCI into earnings is reported in interest, net for interest rate swaps and in cost of sales and SG&A expenses for foreign exchange contracts.

[3] Gain (loss) recognized in earnings is related to the ineffective portion of the hedging relationship, including SG&A expenses for foreign exchange contracts and interest, net for interest rate contracts. No amounts were reported as a result of being excluded from the assessment of hedge effectiveness.

[4] Gain (loss) recognized in earnings is reported in interest, net for interest rate contracts, in cost of sales for commodity contracts, and in SG&A expenses for equity contracts and foreign exchange contracts.