XML 116 R87.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Retirement Plans - Additional Information (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2018 USD ($) RetireeandBeneficiary | Feb. 28, 2018 USD ($) | May 31, 2017 USD ($) Employee | Feb. 28, 2018 USD ($) | May 31, 2019 USD ($) | May 31, 2018 USD ($) | May 31, 2017 USD ($) | May 31, 2016 | May 31, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
U.S. pension plan actual rate of return on assets |  |  |  |  |  | 6.30% | 9.20% | 0.90% |
Weighted average discount rate percent all pension postretirement plans |  |  |  |  |  | 4.11% | 3.98% | 4.04% | 4.38%
Actual rate of return on plan assets for the 15-year period |  |  |  |  |  | 8.20% |  |  |
Defined benefit plan health care cost trend rate assumed for next fiscal year | 6.30% |  |  |  |  | 6.30% |  |  |
Defined benefit plan ultimate health care cost trend rate | 4.50% |  |  |  |  | 4.50% |  |  |
Defined benefit plan year that rate reaches ultimate trend rate |  |  |  |  |  | 2037 |  |  |
Metropolitan Life Insurance Company |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
One-time settlement loss | $ 210,000,000 |  |  |  |  |  |  |  |
U.S. Plans [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Contributions By Employer |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  | $ 2,500,000,000 | $ 2,000,000,000 |  |
Pension Plans [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Expected long-term rate of return on assets |  |  |  |  |  | 6.50% | 6.50% | 6.50% |
Pension Plans [Member] | Scenario Forecast [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Expected long-term rate of return on assets |  |  |  |  | 6.75% |  |  |  |
Pension Plans [Member] | U.S. Plans [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Expected long-term rate of return on assets |  |  |  |  |  | 6.50% | 6.50% | 6.50% |
Number of former employees elected to receive lump sum distribution | Employee |  |  | 18,300 |  |  |  |  |  |
Lump sum amount paid to former employees |  |  | $ 1,300,000,000 |  |  |  |  |  |
Group annuity contract and transfer |  |  |  |  |  | $ 6,178,000,000 |  |  |
Defined Benefit Plan Contributions By Employer |  |  |  |  |  | $ 2,547,000,000 | $ 2,020,000,000 |  |
Pension Plans [Member] | U.S. Plans [Member] | Scenario Forecast [Member] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined Benefit Plan Contributions By Employer |  |  |  |  | $ 0 |  |  |  |
Pension Plans [Member] | U.S. Plans [Member] | Metropolitan Life Insurance Company |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |
Defined benefit plan responsibility transferred to number of retirees and beneficiaries | RetireeandBeneficiary | 41,000 |  |  |  |  |  |  |  |
Group annuity contract and transfer | $ 6,000,000,000 |  |  |  |  |  |  |  |

X
- Definition Define benefit plan former employees elected to receive lump-sum distributions. + References No definition available. + Details
Name: | fdx_DefineBenefitPlanFormerEmployeesElectedToReceiveLumpSumDistributions
Namespace Prefix: | fdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The actual rate of return on plan assets for the 15-year period reflecting the average rate of earnings on the funds invested to provide for the benefits included in the benefit obligation. + References No definition available. + Details
Name: | fdx_DefinedBenefitPlanAssetsActualRateOfReturnForFifteenYearPeriod
Namespace Prefix: | fdx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan responsibility transferred to number of retirees and beneficiaries. + References No definition available. + Details
Name: | fdx_DefinedBenefitPlanResponsibilityTransferredToNumberOfRetireesAndBeneficiaries
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit plan settlement loss. + References No definition available. + Details
Name: | fdx_DefinedBenefitPlanSettlementLoss
Namespace Prefix: | fdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of former employees elected to receive lump sum distribution. + References No definition available. + Details
Name: | fdx_NumberOfFormerEmployeesElectedToReceiveLumpSumDistribution
Namespace Prefix: | fdx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition U.S. pension plan actual rate of return on assets. + References No definition available. + Details
Name: | fdx_USPensionPlanActualRateOfReturnOnAssets
Namespace Prefix: | fdx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average interest rate used to adjust for the time value of money for all pension and postretirement plans. + References No definition available. + Details
Name: | fdx_WeightedAverageDiscountRatePercentAllPensionPostRetirementPlans
Namespace Prefix: | fdx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + 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 (k)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + 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 (a)(10) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Year ultimate health care cost trend rate is expected to be reached, in CCYY format. + 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 (l) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CounterpartyNameAxis=fdx_MetropolitanLifeInsuranceCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |