Retirement Plans - Schedule of Fair Value of Plan Assets for Pension Plans with a PBO or ABO in Excess of Plan Assets (Details) - Pension Plans [Member] - USD ($) $ in Millions |
May 31, 2019 |
May 31, 2018 |
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| U.S. Plans [Member] | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Fair value of plan assets | $ 23,320 | $ 22,057 | |||
| PBO | (26,554) | (22,653) | |||
| Net funded status | (3,234) | (596) | |||
| ABO | [1] | (25,915) | (1,134) | ||
| Fair value of plan assets | 23,320 | 859 | |||
| PBO | (26,554) | (1,214) | |||
| Net funded status | (3,234) | (355) | |||
| International Pension Plans [Member] | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Fair value of plan assets | 1,125 | 1,060 | |||
| PBO | (1,929) | (1,791) | |||
| Net funded status | (804) | (731) | |||
| ABO | [1] | (1,709) | (1,581) | ||
| Fair value of plan assets | 1,120 | 1,060 | |||
| PBO | (1,925) | (1,791) | |||
| Net funded status | $ (805) | $ (731) | |||
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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. No definition available.
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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. No definition available.
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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. No definition available.
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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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