Debt (Schedule of long-term debt) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2018	May 27, 2018	May 28, 2017	Oct. 31, 2017
Debt Instrument [Line Items]
Long-term debt, including current portion		$ 14,268.8	$ 8,247.6
Other, including debt issuance costs and capital leases		(81.7)	(39.8)
Current portion of long-term debt		(1,600.1)	(604.7)
Total long-term debt		$ 12,668.7	7,642.9
4.2% notes due April 17, 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.20%
Maturity date		Apr. 17, 2028
Long-term debt, including current portion		$ 1,400.0
5.65% notes due February 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.65%
Maturity date		Feb. 15, 2019
Long-term debt, including current portion		$ 1,150.0	1,150.0
3.15% notes due December 15, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.15%
Maturity date		Dec. 15, 2021
Long-term debt, including current portion		$ 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%
Maturity date		Oct. 17, 2023
Long-term debt, including current portion		$ 850.0
Floating-rate notes due April 16, 2021 [Member]
Debt Instrument [Line Items]
Maturity date		Apr. 16, 2021
Long-term debt, including current portion		$ 850.0
4.0% notes due April 17, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.00%
Maturity date		Apr. 17, 2025
Long-term debt, including current portion		$ 800.0
3.2% notes due February 10, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.20%
Maturity date		Feb. 10, 2027
Long-term debt, including current portion		$ 750.0	750.0
4.7% notes due April 17, 2048 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.70%
Maturity date		Apr. 17, 2048
Long-term debt, including current portion		$ 650.0
3.2% notes due April 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.20%
Maturity date		Apr. 16, 2021
Long-term debt, including current portion		$ 600.0
Euro-denominated 2.1% notes due November 16, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.10%
Maturity date		Nov. 16, 2020
Long-term debt, including current portion		$ 582.6	559.2
Euro-denominated 1.0% notes due April 27, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.00%
Maturity date		Apr. 27, 2023
Long-term debt, including current portion		$ 582.6	559.2
Euro-denominated floating-rate notes due January 15, 2020 [Member]
Debt Instrument [Line Items]
Maturity date		Jan. 15, 2020
Long-term debt, including current portion		$ 582.6	$ 559.2
1.4% notes due October 20, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.40%	1.40%
Maturity date			Oct. 20, 2017
Long-term debt, including current portion		$ 0.0	$ 500.0
4.55% notes due April 17, 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.55%
Maturity date		Apr. 17, 2038
Long-term debt, including current portion		$ 500.0
2.6% notes due October 12, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.60%
Maturity date		Oct. 12, 2022
Long-term debt, including current portion		$ 500.0
5.4% notes due June 15, 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.40%
Maturity date		Jun. 15, 2040
Long-term debt, including current portion		$ 500.0	500.0
4.15% notes due February 15, 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.15%
Maturity date		Feb. 15, 2043
Long-term debt, including current portion		$ 500.0	500.0
3.65% notes due February 15, 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.65%
Maturity date		Feb. 15, 2024
Long-term debt, including current portion		$ 500.0	500.0
2.2% notes due October 21, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.20%
Maturity date		Oct. 21, 2019
Long-term debt, including current portion		$ 500.0	500.0
Euro-denominated 1.5% notes due April 27, 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.50%
Maturity date		Apr. 27, 2027
Long-term debt, including current portion		$ 466.1	447.3
Floating-rate notes due October 17, 2023 [Member]
Debt Instrument [Line Items]
Maturity date		Oct. 17, 2023
Long-term debt, including current portion		$ 400.0
Euro-denominated 2.2% notes due June 24, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.20%
Maturity date		Jun. 24, 2021
Long-term debt, including current portion		$ 232.8	222.8
Euro-denominated floating-rate notes due March 20, 2019 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 20, 2019
Long-term debt, including current portion		$ 349.6	335.5
Medium-term Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.39%
Maturity date	May 28, 2023
Long-term debt, including current portion		$ 104.2	$ 204.2
Medium-term Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.36%
Medium-term Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.59%