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Retirement Plans (Details 9) - USD ($) $ in Millions | May 31, 2016 | May 31, 2015
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Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets [Abstract] |  |
Fair value of plan assets | $ 23,867 | $ 23,099
PBO | (29,251) | (27,132)
Net funded status | $ (5,384) | $ (4,033)

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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. + References No definition available. + Details
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- References No definition available. + Details
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- Definition If aggregate disclosures are presented, the aggregate benefit obligation for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate fair value of plan assets for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 + Details
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