Long-term Debt and Other Financing Arrangements - Components of Long-term Debt (Net of Discounts and Debt Issuance Costs) (Details) - USD ($) $ in Millions	May 31, 2019	May 31, 2018
Debt Instrument [Line Items]
Long Term Debt	$ 17,518	$ 16,510
Other debt	1	4
Capital lease obligations	62	71
Total Debt and Capital Lease Obligations	17,581	16,585
Less current portion	964	1,342
LONG-TERM DEBT, LESS CURRENT PORTION	16,617	15,243
Senior Unsecured Debt Due 2019 8.00% [Member]
Debt Instrument [Line Items]
Long Term Debt		750
Senior Unsecured Debt Due 2020 2.30% [Member]
Debt Instrument [Line Items]
Long Term Debt	400	399
Senior Unsecured Debt Due 2022 3.40% [Member]
Debt Instrument [Line Items]
Long Term Debt	497
Senior Unsecured Debt Due 2023 2.625-2.70% [Member]
Debt Instrument [Line Items]
Long Term Debt	747	746
Senior Unsecured Debt Due 2024 4.00% [Member]
Debt Instrument [Line Items]
Long Term Debt	746	746
Senior Unsecured Debt Due 2025 3.20% [Member]
Debt Instrument [Line Items]
Long Term Debt	696	695
Senior Unsecured Debt Due 2026 3.25% [Member]
Debt Instrument [Line Items]
Long Term Debt	745	744
Senior Unsecured Debt Due 2027 3.30% [Member]
Debt Instrument [Line Items]
Long Term Debt	446	445
Senior Unsecured Debt Issued 2028 3.40% [Member]
Debt Instrument [Line Items]
Long Term Debt	495	495
Senior Unsecured Debt Issued 2029 4.20% [Member]
Debt Instrument [Line Items]
Long Term Debt	396
Senior Unsecured Debt Due 2034 4.90% [Member]
Debt Instrument [Line Items]
Long Term Debt	495	495
Senior Unsecured Debt Due 2035 3.90% [Member]
Debt Instrument [Line Items]
Long Term Debt	494	493
Senior Unsecured Debt Due 2043 3.875-4.10% [Member]
Debt Instrument [Line Items]
Long Term Debt	984	983
Senior Unsecured Debt Due 2044 5.10% [Member]
Debt Instrument [Line Items]
Long Term Debt	742	742
Senior Unsecured Debt Due 2045 4.10% [Member]
Debt Instrument [Line Items]
Long Term Debt	641	640
Senior Unsecured Debt Due 2046 4.55-4.75% [Member]
Debt Instrument [Line Items]
Long Term Debt	2,460	2,459
Senior Unsecured Debt Due 2047 4.40% [Member]
Debt Instrument [Line Items]
Long Term Debt	735	735
Senior Unsecured Debt Due 2048 4.05% [Member]
Debt Instrument [Line Items]
Long Term Debt	986	986
Senior Unsecured Debt Due 2049 4.95% [Member]
Debt Instrument [Line Items]
Long Term Debt	835
Senior Unsecured Debt Due 2065 4.50% [Member]
Debt Instrument [Line Items]
Long Term Debt	246	246
Senior Unsecured Debt Due 2098 7.60% [Member]
Debt Instrument [Line Items]
Long Term Debt	237	237
Euro Senior Unsecured Debt Due 2019 Floating Rate [Member]
Debt Instrument [Line Items]
Long Term Debt		582
Euro Senior Unsecured Debt Due 2020 0.50% [Member]
Debt Instrument [Line Items]
Long Term Debt	559	581
Euro Senior Unsecured Debt Due 2022 0.70% [Member]
Debt Instrument [Line Items]
Long Term Debt	713
Euro Senior Unsecured Debt Due 2023 1.00% [Member]
Debt Instrument [Line Items]
Long Term Debt	836	869
Euro Senior Unsecured Debt Due 2027 1.625% [Member]
Debt Instrument [Line Items]
Long Term Debt	$ 1,387	$ 1,442

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt classified as other.

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