Debt (Schedule of long-term debt) (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 26, 2019
Debt Instrument [Line Items]
Long-term debt, including current portion	$ 13,260.5	$ 13,021.3
Other, including debt issuance costs and capital leases	(58.0)	(71.4)
Current portion of long-term debt	(2,331.5)	(1,396.5)
Total long-term debt	$ 10,929.0	$ 11,624.8
4.2% notes due April 17, 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.20%	4.20%
Maturity date	Apr. 17, 2028	Apr. 17, 2028
Long-term Debt, Gross	$ 1,400.0	$ 1,400.0
3.15% notes due December 15, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.15%	3.15%
Maturity date	Dec. 15, 2021	Dec. 15, 2021
Long-term Debt, Gross	$ 1,000.0	$ 1,000.0
3.7% notes due October 17, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.70%	3.70%
Maturity date	Oct. 17, 2023	Oct. 17, 2023
Long-term Debt, Gross	$ 850.0	$ 850.0
Floating-rate notes due April 16, 2021 [Member]
Debt Instrument [Line Items]
Maturity date	Apr. 16, 2021	Apr. 16, 2021
Long-term Debt, Gross	$ 850.0	$ 850.0
4.0% notes due April 17, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%
Maturity date	Apr. 17, 2025	Apr. 17, 2025
Long-term Debt, Gross	$ 800.0	$ 800.0
3.2% notes due February 10, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.20%	3.20%
Maturity date	Feb. 10, 2027	Feb. 10, 2027
Long-term Debt, Gross	$ 750.0	$ 750.0
2.875% notes due April 15, 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.875%
Maturity date	Apr. 15, 2030
Long-term Debt, Gross	$ 750.0	0.0
Euro-denominated 0.45% notes due January 15, 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.45%
Maturity date	Jan. 15, 2026
Long-term Debt, Gross	$ 666.1	$ 0.0
4.7% notes due April 17, 2048 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.70%	4.70%
Maturity date	Apr. 17, 2048	Apr. 17, 2048
Long-term Debt, Gross	$ 650.0	$ 650.0
3.2% notes due April 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.20%	3.20%
Maturity date	Apr. 16, 2021	Apr. 16, 2021
Long-term Debt, Gross	$ 600.0	$ 600.0
Euro-denominated 2.1% notes due November 16, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.10%	2.10%
Maturity date	Nov. 16, 2020	Nov. 16, 2020
Long-term Debt, Gross	$ 555.1	$ 560.1
Euro-denominated 1.0% notes due April 27, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.00%	1.00%
Maturity date	Apr. 27, 2023	Apr. 27, 2023
Long-term Debt, Gross	$ 555.1	$ 560.1
Euro-denominated floating-rate notes due January 15, 2020 [Member]
Debt Instrument [Line Items]
Maturity date	Jan. 15, 2020	Jan. 15, 2020
Long-term Debt, Gross	$ 0.0	$ 560.1
4.55% notes due April 17, 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.55%	4.55%
Maturity date	Apr. 17, 2038	Apr. 17, 2038
Long-term Debt, Gross	$ 500.0	$ 500.0
2.6% notes due October 12, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.60%	2.60%
Maturity date	Oct. 12, 2022	Oct. 12, 2022
Long-term Debt, Gross	$ 500.0	$ 500.0
5.4% notes due June 15, 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.40%	5.40%
Maturity date	Jun. 15, 2040	Jun. 15, 2040
Long-term Debt, Gross	$ 500.0	$ 500.0
4.15% notes due February 15, 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.15%	4.15%
Maturity date	Feb. 15, 2043	Feb. 15, 2043
Long-term Debt, Gross	$ 500.0	$ 500.0
3.65% notes due February 15, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.65%	3.65%
Maturity date	Feb. 15, 2024	Feb. 15, 2024
Long-term Debt, Gross	$ 500.0	$ 500.0
2.2% notes due October 21, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.20%	2.20%
Maturity date	Oct. 21, 2019	Oct. 21, 2019
Long-term Debt, Gross	$ 0.0	$ 500.0
Euro-denominated 1.5% notes due April 27, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.50%	1.50%
Maturity date	Apr. 27, 2027	Apr. 27, 2027
Long-term Debt, Gross	$ 444.0	$ 448.1
Floating-rate notes due October 17, 2023 [Member]
Debt Instrument [Line Items]
Maturity date	Oct. 17, 2023	Oct. 17, 2023
Long-term Debt, Gross	$ 400.0	$ 400.0
Euro-denominated 0.0% notes due January 15, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%	0.00%
Maturity date	Jan. 15, 2020	Jan. 15, 2020
Long-term Debt, Gross	$ 0.0	$ 336.1
Euro-denominated 2.2% notes due June 24, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.20%	2.20%
Maturity date	Jun. 24, 2021	Jun. 24, 2021
Long-term Debt, Gross	$ 222.0	$ 224.0
Euro-denominated 0.0% notes due November 16, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%
Maturity date	Nov. 16, 2020
Long-term Debt, Gross	$ 222.0	$ 0.0
Medium-term Notes [Member]
Debt Instrument [Line Items]
Maturity date	May 30, 2021	May 30, 2021
Long-term Debt, Gross	$ 104.2	$ 104.2
Medium-term Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.56%	0.56%
Medium-term Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.61%	6.61%