NOTES PAYABLE AND OTHER BORROWINGS (Details) € in Millions, $ in Millions		12 Months Ended
		May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2018 EUR (€)		Nov. 30, 2017 USD ($)	Jul. 07, 2016 USD ($)	Jul. 10, 2013 EUR (€)
Notes Payable Other Borrowings [Line Items]
Notes payable and other borrowings		$ 60,927	$ 58,145
Unamortized discount/issuance costs		(282)	(276)
Hedge accounting fair value adjustments	[1]	(26)	40
Total notes payable and other borrowings		60,619	57,909
Notes payable and other borrowings, current		4,491	9,797
Notes payable and other borrowings, non-current		56,128	48,112
Senior notes and other borrowings, par value		$ 60,927				$ 10,000	$ 14,000	€ 2,000
1.20% senior notes due October 2017 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Oct. 25, 2012
Notes payable and other borrowings			$ 2,500
Effective interest rate			1.24%
Senior notes and other borrowings, par value			$ 2,500
Stated interest rate percentage			1.20%
Maturity date			Oct. 15, 2017
5.75% senior notes due April 2018 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Apr. 09, 2008
Notes payable and other borrowings			$ 2,500
Effective interest rate			5.76%
Senior notes and other borrowings, par value			$ 2,500
Stated interest rate percentage			5.75%
Maturity date			Apr. 15, 2018
2.375% senior notes due January 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[1]	Jul. 16, 2013
Notes payable and other borrowings	[1]	$ 1,500	$ 1,500
Effective interest rate	[1]	2.44%	2.44%	2.44%
Senior notes and other borrowings, par value	[1]	$ 1,500
Stated interest rate percentage		2.375%		2.375%
Maturity date	[1]	Jan. 15, 2019
5.00% senior notes due July 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 09, 2009
Notes payable and other borrowings		$ 1,750	$ 1,750
Effective interest rate		5.05%	5.05%	5.05%
Senior notes and other borrowings, par value		$ 1,750
Stated interest rate percentage		5.00%		5.00%
Maturity date		Jul. 08, 2019
2.25% senior notes due October 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[1]	Jul. 08, 2014
Notes payable and other borrowings	[1]	$ 2,000	$ 2,000
Effective interest rate	[1]	2.27%	2.27%	2.27%
Senior notes and other borrowings, par value	[1]	$ 2,000
Stated interest rate percentage		2.25%		2.25%
Maturity date	[1]	Oct. 08, 2019
3.875% senior notes due July 2020 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 12, 2010
Notes payable and other borrowings		$ 1,000	$ 1,000
Effective interest rate		3.93%	3.93%	3.93%
Senior notes and other borrowings, par value		$ 1,000
Stated interest rate percentage		3.875%		3.875%
Maturity date		Jul. 15, 2020
2.25% senior notes due January 2021 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[2],[3]	Jul. 10, 2013
Notes payable and other borrowings	[2],[3]	$ 1,446	$ 1,395
Effective interest rate	[2],[3]	2.33%	2.33%	2.33%
Senior notes and other borrowings, par value | €				€ 1,250	[2],[3]			1,250
Stated interest rate percentage		2.25%		2.25%
Maturity date	[2],[3]	Jan. 10, 2021
2.80% senior notes due July 2021 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[1]	Jul. 08, 2014
Notes payable and other borrowings	[1]	$ 1,500	$ 1,500
Effective interest rate	[1]	2.82%	2.82%	2.82%
Senior notes and other borrowings, par value		$ 1,500
Stated interest rate percentage		2.80%		2.80%
Maturity date		Jul. 08, 2021
1.90% senior notes due September 2021 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[4]	Jul. 07, 2016
Notes payable and other borrowings	[4]	$ 4,250	$ 4,250
Effective interest rate	[4]	1.94%	1.94%	1.94%
Senior notes and other borrowings, par value	[4]	$ 4,250
Stated interest rate percentage		1.90%		1.90%
Maturity date	[4]	Sep. 15, 2021
2.50% senior notes due May 2022 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 2,500	$ 2,500
Effective interest rate		2.56%	2.56%	2.56%
Senior notes and other borrowings, par value		$ 2,500
Stated interest rate percentage		2.50%		2.50%
Maturity date		May 15, 2022
2.50% senior notes due October 2022 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Oct. 25, 2012
Notes payable and other borrowings		$ 2,500	$ 2,500
Effective interest rate		2.51%	2.51%	2.51%
Senior notes and other borrowings, par value		$ 2,500
Stated interest rate percentage		2.50%		2.50%
Maturity date		Oct. 15, 2022
2.625% senior notes due february 2023 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[5]	Nov. 09, 2017
Notes payable and other borrowings	[5]	$ 1,250
Effective interest rate		2.64%		2.64%
Senior notes and other borrowings, par value		$ 1,250
Stated interest rate percentage		2.625%		2.625%
Maturity date		Feb. 15, 2023
3.625% senior notes due July 2023 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[2],[6]	Jul. 16, 2013
Notes payable and other borrowings		$ 1,000	$ 1,000
Effective interest rate		3.73%	3.73%	3.73%
Senior notes and other borrowings, par value		$ 1,000
Stated interest rate percentage		3.625%		3.625%
Maturity date		Jul. 23, 2023
2.40% senior notes due September 2023 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[4]	Jul. 07, 2016
Notes payable and other borrowings	[4]	$ 2,500	$ 2,500
Effective interest rate	[4]	2.40%	2.40%	2.40%
Senior notes and other borrowings, par value	[4]	$ 2,500
Stated interest rate percentage		2.40%		2.40%
Maturity date	[4]	Sep. 15, 2023
3.40% senior notes due July 2024 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2014
Notes payable and other borrowings		$ 2,000	$ 2,000
Effective interest rate		3.43%	3.43%	3.43%
Senior notes and other borrowings, par value		$ 2,000
Stated interest rate percentage		3.40%		3.40%
Maturity date		Jul. 08, 2024
2.95% senior notes due November 2024 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[5]	Nov. 09, 2017
Notes payable and other borrowings	[5]	$ 2,000
Effective interest rate		2.98%		2.98%
Senior notes and other borrowings, par value		$ 2,000
Stated interest rate percentage		2.95%		2.95%
Maturity date		Nov. 15, 2024
2.95% senior notes due May 2025 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 2,500	$ 2,500
Effective interest rate		3.00%	3.00%	3.00%
Senior notes and other borrowings, par value		$ 2,500
Stated interest rate percentage		2.95%		2.95%
Maturity date		May 15, 2025
3.125% senior notes due July 2025 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[6]	Jul. 10, 2013
Notes payable and other borrowings	[2],[6]	$ 868	$ 837
Effective interest rate	[2],[6]	3.17%	3.17%	3.17%
Senior notes and other borrowings, par value | €				€ 750	[2],[6]			€ 750
Stated interest rate percentage		3.125%		3.125%
Maturity date	[2],[6]	Jul. 10, 2025
2.65% senior notes due July 2026 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[4]	Jul. 07, 2016
Notes payable and other borrowings	[4]	$ 3,000	$ 3,000
Effective interest rate	[4]	2.69%	2.69%	2.69%
Senior notes and other borrowings, par value	[4]	$ 3,000
Stated interest rate percentage		2.65%		2.65%
Maturity date	[4]	Jul. 15, 2026
3.25% senior notes due November 2027 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[5]	Nov. 09, 2017
Notes payable and other borrowings	[5]	$ 2,750
Effective interest rate		3.26%		3.26%
Senior notes and other borrowings, par value		$ 2,750
Stated interest rate percentage		3.25%		3.25%
Maturity date		Nov. 15, 2027
3.25% senior notes due May 2030 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 500	$ 500
Effective interest rate		3.30%	3.30%	3.30%
Senior notes and other borrowings, par value		$ 500
Stated interest rate percentage		3.25%		3.25%
Maturity date		May 15, 2030
4.30% senior notes due July 2034 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2014
Notes payable and other borrowings		$ 1,750	$ 1,750
Effective interest rate		4.30%	4.30%	4.30%
Senior notes and other borrowings, par value		$ 1,750
Stated interest rate percentage		4.30%		4.30%
Maturity date		Jul. 08, 2034
3.90% senior notes due May 2035 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 1,250	$ 1,250
Effective interest rate		3.95%	3.95%	3.95%
Senior notes and other borrowings, par value		$ 1,250
Stated interest rate percentage		3.90%		3.90%
Maturity date		May 15, 2035
3.85% senior notes due July 2036 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[4]	Jul. 07, 2016
Notes payable and other borrowings	[4]	$ 1,250	$ 1,250
Effective interest rate	[4]	3.85%	3.85%	3.85%
Senior notes and other borrowings, par value	[4]	$ 1,250
Stated interest rate percentage		3.85%		3.85%
Maturity date	[4]	Jul. 15, 2036
3.80% senior notes due November 2037 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[5]	Nov. 09, 2017
Notes payable and other borrowings	[5]	$ 1,750
Effective interest rate		3.83%		3.83%
Senior notes and other borrowings, par value		$ 1,750
Stated interest rate percentage		3.80%		3.80%
Maturity date		Nov. 15, 2037
6.50% senior notes due April 2038 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[1]	Apr. 09, 2008
Notes payable and other borrowings		$ 1,250	$ 1,250
Effective interest rate		6.52%	6.52%	6.52%
Senior notes and other borrowings, par value		$ 1,250
Stated interest rate percentage		6.50%		6.50%
Maturity date		Apr. 15, 2038
6.125% senior notes due July 2039 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2009
Notes payable and other borrowings		$ 1,250	$ 1,250
Effective interest rate		6.19%	6.19%	6.19%
Senior notes and other borrowings, par value		$ 1,250
Stated interest rate percentage		6.125%		6.125%
Maturity date		Jul. 08, 2039
5.375% senior notes due July 2040 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 12, 2010
Notes payable and other borrowings		$ 2,250	$ 2,250
Effective interest rate		5.45%	5.45%	5.45%
Senior notes and other borrowings, par value		$ 2,250
Stated interest rate percentage		5.375%		5.375%
Maturity date		Jul. 15, 2040
4.50% senior notes due July 2044 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2014
Notes payable and other borrowings		$ 1,000	$ 1,000
Effective interest rate		4.50%	4.50%	4.50%
Senior notes and other borrowings, par value		$ 1,000
Stated interest rate percentage		4.50%		4.50%
Maturity date		Jul. 08, 2044
4.125% senior notes due May 2045 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 2,000	$ 2,000
Effective interest rate		4.15%	4.15%	4.15%
Senior notes and other borrowings, par value		$ 2,000
Stated interest rate percentage		4.125%		4.125%
Maturity date		May 15, 2045
4.00% senior notes due July 2046 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[4]	Jul. 07, 2016
Notes payable and other borrowings	[4]	$ 3,000	$ 3,000
Effective interest rate	[4]	4.00%	4.00%	4.00%
Senior notes and other borrowings, par value	[4]	$ 3,000
Stated interest rate percentage		4.00%		4.00%
Maturity date	[4]	Jul. 15, 2046
4.00% senior notes due November 2047 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance	[5]	Nov. 09, 2017
Notes payable and other borrowings	[5]	$ 2,250
Effective interest rate		4.03%		4.03%
Senior notes and other borrowings, par value		$ 2,250
Stated interest rate percentage		4.00%		4.00%
Maturity date		Nov. 15, 2047
4.375% senior notes due May 2055 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 05, 2015
Notes payable and other borrowings		$ 1,250	$ 1,250
Effective interest rate		4.40%	4.40%	4.40%
Senior notes and other borrowings, par value		$ 1,250
Stated interest rate percentage		4.375%		4.375%
Maturity date		May 15, 2055
Floating rate senior notes due July 2017 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2014
Notes payable and other borrowings			$ 1,000
Effective interest rate			1.35%
Senior notes and other borrowings, par value			$ 1,000
Maturity date			Jul. 07, 2017
Debt instrument LIBOR rate			0.20%
Floating rate senior notes due January 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 16, 2013
Notes payable and other borrowings		$ 500	$ 500
Effective interest rate		2.93%	1.74%	2.93%
Senior notes and other borrowings, par value		$ 500
Maturity date		Jan. 15, 2019
Debt instrument LIBOR rate		0.58%
Floating rate senior notes due October 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Jul. 08, 2014
Notes payable and other borrowings		$ 750	$ 750
Effective interest rate		2.84%	1.67%	2.84%
Senior notes and other borrowings, par value		$ 750
Maturity date		Oct. 08, 2019
Debt instrument LIBOR rate		0.51%
Revolving credit agreements due June 2017 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 31, 2017
Notes payable and other borrowings, current			$ 3,800
Effective interest rate			1.54%
Senior notes and other borrowings, par value		$ 3,800
Maturity date		Jun. 30, 2017
Debt instrument LIBOR rate		0.50%
Revolving credit agreements due June 2018 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		May 31, 2018
Notes payable and other borrowings, current		$ 2,500
Effective interest rate		2.48%		2.48%
Senior notes and other borrowings, par value			$ 2,500
Maturity date			Jun. 29, 2018
Debt instrument LIBOR rate			0.50%
Other borrowings due August 2025 [Member]
Notes Payable Other Borrowings [Line Items]
Date of issuance		Nov. 07, 2016
Notes payable and other borrowings		$ 113	$ 113
Effective interest rate		3.53%	3.53%	3.53%
Maturity date		Aug. 01, 2025

[1] We have entered into certain interest rate swap agreements that have the economic effects of modifying the fixed-interest obligations associated with the 2.375% senior notes due January 2019 (January 2019 Notes), the 2.25% senior notes due October 2019 (October 2019 Notes), the 2.80% senior notes due July 2021 (July 2021 Notes), and the 6.50% senior notes due April 2038 (April 2038 Notes) so that the interest payable on these notes effectively became variable based on LIBOR. The effective interest rates after consideration of these fixed to variable interest rate swap agreements were 3.00% and 1.81%, respectively, for the January 2019 Notes, 2.81% and 1.64%, respectively, for the October 2019 Notes, and 2.96% and 1.79%, respectively, for the July 2021 Notes as of May 31, 2018 and 2017, respectively. The effective interest rate as of May 31, 2018 after consideration of the fixed to variable interest rate swap agreements was 5.65% for the April 2038 Notes. Refer to Notes 1 and 10 for a description of our accounting for fair value hedges.

[2] In July 2013, we issued €2.0 billion of fixed-rate senior notes comprised of €1.25 billion of 2.25% senior notes due January 2021 (January 2021 Notes) and €750 million of 3.125% senior notes due July 2025 (July 2025 Notes, and together with the January 2021 Notes, the Euro Notes). Principal and unamortized discount/issuance costs for the Euro Notes in the table above were calculated using foreign currency exchange rates as of May 31, 2018 and May 31, 2017, respectively. The Euro Notes are registered and trade on the New York Stock Exchange.

[3] In connection with the issuance of the January 2021 Notes, we entered into certain cross-currency swap agreements that have the economic effect of converting our fixed-rate, Euro-denominated debt, including annual interest payments and the payment of principal at maturity, to a fixed-rate, U.S. Dollar-denominated debt of $1.6 billion with a fixed annual interest rate of 3.53% (see Note 10 for additional information).

[4] In July 2016, we issued $14.0 billion of senior notes for general corporate purposes, which may include stock repurchases, payment of cash dividends on our common stock and repayment of indebtedness and future acquisitions. The interest is payable semi-annually. We may redeem some or all of the senior notes of each series prior to their maturity, subject to certain restrictions, and the payment of an applicable make-whole premium in certain instances.

[5] In November 2017, we issued $10.0 billion of senior notes for general corporate purposes, which may include stock repurchases, payment of cash dividends on our common stock and repayment of indebtedness and future acquisitions. The interest is payable semi-annually. We may redeem some or all of the senior notes of each series prior to their maturity, subject to certain restrictions, and the payment of an applicable make-whole premium in certain instances

[6] We designated the July 2025 Notes as a net investment hedge of our investments in certain of our international subsidiaries that use the Euro as their functional currency in order to reduce the volatility in stockholders’ equity caused by the changes in foreign currency exchange rates of the Euro with respect to the U.S. Dollar in connection with the issuance of the July 2025 Notes. In our fourth quarter of fiscal 2018 we de-designated the 2025 Notes as a net investment hedge and entered into certain cross-currency interest rate swap agreements that have the economic effect of converting our fixed-rate, Euro-denominated debt, including annual interest payments and the payment of principal at maturity, to a variable-rate, U.S. Dollar-denominated debt of $0.9 billion based on LIBOR. The effective interest rate as of May 31, 2018 after consideration of the cross-currency interest rate swap agreements was 5.17% for the July 2025 Notes. Refer to Notes 1 and 10 for a description of our accounting for fair value hedges.