XML 77 R67.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Commitments and Contingent Liabilities - Narrative (Details) $ in Millions |  |  |  | 26 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 21, 2020 | Jan. 09, 2020 USD ($) | Oct. 21, 2019 USD ($) company state_attorney | Dec. 31, 2019 USD ($) state complaint state_attorney relator case | Jan. 06, 2020 company | Nov. 30, 2019 complaint | Oct. 31, 2019 complaint | Oct. 09, 2017 case
In re: National Prescription Opioid Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity |  |  |  | 2,700 |  |  |  |
In re McKesson Corporation Stockholder Derivative Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity |  |  |  |  |  |  |  | 2
Number of new/additional suits filed |  |  |  | 4 |  |  |  |
Amount to be paid by insurance carriers under settlement agreement | $ |  |  |  | $ 175 |  |  |  |
Police & Fire Ret. Sys. of the City of Detroit v. McKesson Corporation, et al., Amalgamated Bank v. McKesson Corporation, et al., and Greene v. McKesson Corporation, et al. |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of new/additional suits filed |  |  |  | 3 |  |  |  |
Powell Prescription Center, et al. v. Surescripts, LLC, et al., and Intergrated Pharmaceutical Solutions LLC v. Surescripts, LLC |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity | complaint |  |  |  |  |  |  | 3 |
Kennebunk Village Pharmacy, Inc. v. SureScripts, LLC, et al., 1:19-cv-7445; Whitman v. SureScripts, LLC et al., No. 1:19-cv-7448; BBK Global Corp. v. SureScripts, LLC et al., 1:19-cv-7640 |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity | complaint |  |  |  |  |  | 3 |  |
Consolidated Actions |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity | complaint |  |  |  | 6 |  |  |  |
United States of America, ex rel. Carl Kelley and Michael McElligott, 19-cv-2233, and State of California, ex rel. Carl Kelley and Michael McElligott, CGC-19-576931 |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity | complaint |  |  |  | 2 |  |  |  |
Number of relators alleging violations | relator |  |  |  | 2 |  |  |  |
Subsequent Event | Related to Two Counties |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Payments under settlement agreement | $ |  | $ 82 |  |  |  |  |  |
Subsequent Event | United States District Court for the Northern District of California, Case No. 19-cv-02869 |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of days given to file amended complaint | 30 days |  |  |  |  |  |  |
Pending |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Complaints filed against the entity |  |  |  | 360 |  |  |  |
Number of states in which court cases are pending | state |  |  |  | 44 |  |  |  |
Number of attorney generals that have filed claims | state_attorney |  |  |  | 20 |  |  |  |
Pending | In re: National Prescription Opioid Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of cases selected for possible remand to other federal courts |  |  |  | 3 |  |  |  |
Number of state attorneys general involved in resolution discussions | state_attorney |  |  | 4 |  |  |  |  |
Award payable under proposed framework | $ |  |  | $ 6,900 |  |  |  |  |
Period over which award would be payable under proposed framework |  |  | 18 years |  |  |  |  |
Number of largest pharmaceutical distributors to adopt anti-diversion programs under proposed framework | company |  |  | 3 |  |  |  |  |
Pending | Three Largest U.S. Pharmaceutical Distributors | In re: National Prescription Opioid Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Award payable under proposed framework | $ |  |  | $ 18,000 |  |  |  |  |
Period over which award would be payable under proposed framework |  |  | 18 years |  |  |  |  |
Number of largest pharmaceutical distributors to adopt anti-diversion programs under proposed framework | company |  |  | 3 |  |  |  |  |
Pending | Subsequent Event | Three Largest U.S. Pharmaceutical Distributors | In re: National Prescription Opioid Litigation |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Number of largest pharmaceutical distributors to adopt anti-diversion programs under proposed framework | company |  |  |  |  | 3 |  |  |

X
- Definition Loss Contingency, Number of Cases Selected For Remand to Other Federal Courts + References No definition available. + Details
Name: | mck_LossContingencyNumberofCasesSelectedForRemandtoOtherFederalCourts
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Number of Days Given to Submit Amended Complaint + References No definition available. + Details
Name: | mck_LossContingencyNumberofDaysGiventoSubmitAmendedComplaint
Namespace Prefix: | mck_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Number of Relators Alleging Violations + References No definition available. + Details
Name: | mck_LossContingencyNumberofRelatorsAllegingViolations
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Number of State Attorney Generals + References No definition available. + Details
Name: | mck_LossContingencyNumberofStateAttorneyGenerals
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Number of States + References No definition available. + Details
Name: | mck_LossContingencyNumberofStates
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Settlement Agreement, Award Payment Period + References No definition available. + Details
Name: | mck_LossContingencySettlementAgreementAwardPaymentPeriod
Namespace Prefix: | mck_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Settlement Agreement, Number of Counterparties + References No definition available. + Details
Name: | mck_LossContingencySettlementAgreementNumberofCounterparties
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Loss Contingency, Settlement Agreement, Terms, Number of Companies to Adopt Anti-Diversion Programs Changes + References No definition available. + Details
Name: | mck_LossContingencySettlementAgreementTermsNumberofCompaniestoAdoptAntiDiversionProgramsChanges
Namespace Prefix: | mck_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12053-110248 + Details
Name: | us-gaap_LossContingencyReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=mck_InreNationalPrescriptionOpiateLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_InreMcKessonCorporationStockholderDerivativeLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_PoliceFireRet.Sys.oftheCityofDetroitv.McKessonCorporationetal.AmalgamatedBankv.McKessonCorporationetal.andGreenev.McKessonCorporationetal.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_PowellPrescriptionCenteretal.v.SurescriptsLLCetal.andIntergratedPharmaceuticalSolutionsLLCv.SurescriptsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_KennebunkVillagePharmacyInc.v.SureScriptsLLCetal.119cv7445Whitmanv.SureScriptsLLCetal.No.119cv7448BBKGlobalCorp.v.SureScriptsLLCetal.119cv7640Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_ConsolidatedActionsvSureScriptsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_UnitedStatesofAmericaexrel.CarlKelleyandMichaelMcElligott19cv2233andStateofCaliforniaexrel.CarlKelleyandMichaelMcElligottCGC19576931Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_ForTwoCountiesInreNationalPrescriptionOpiateLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=mck_UnitedStatesDistrictCourtfortheNorthernDistrictofCaliforniaCaseNo.19cv02869Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=mck_ThreeLargestU.S.PharmaceuticalDistributorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |