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Retirement Plans - Schedule of Tax Qualified Pension Plans Contributions (Details) - U.S. Pension Plans [Member] - USD ($) $ in Millions | 6 Months Ended
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Nov. 30, 2017 | Nov. 30, 2016
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan Contributions By Employer | $ 750 | $ 500
Required Contribution [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan Contributions By Employer | 268 | 250
Voluntary Contribution [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan Contributions By Employer | $ 482 | $ 250

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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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