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, 2020 |
May 31, 2019 |
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| U.S. Plans [Member] | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Fair value of plan assets | $ 26,978 | $ 23,320 | ||
| PBO | (30,199) | (26,554) | ||
| Net funded status | (3,221) | (3,234) | ||
| ABO | [1] | (29,272) | (25,915) | |
| Fair value of plan assets | 26,978 | 23,320 | ||
| PBO | (30,199) | (26,554) | ||
| Net funded status | (3,221) | (3,234) | ||
| International Pension Plans [Member] | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Fair value of plan assets | 205 | 1,125 | ||
| PBO | (876) | (1,929) | ||
| Net funded status | (671) | (804) | ||
| ABO | [1] | (637) | (1,709) | |
| Fair value of plan assets | 175 | 1,120 | ||
| PBO | (840) | (1,925) | ||
| Net funded status | $ (665) | $ (805) | ||
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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/2003/role/disclosureRef
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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/2003/role/disclosureRef
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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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