XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.21.2

Restructuring, Impairment, and Related Charges - Summary of Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | $ 14 | $ 38
Exit and other-related costs | 40 | 13
Asset impairments and accelerated depreciation | 104 | 5
Total | 158 | 56
International |  |
Restructuring Cost and Reserve [Line Items] |  |
Total | 6 | 14
Operating Segments | U.S. Pharmaceutical |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | 2 | 1
Exit and other-related costs | 2 | 1
Asset impairments and accelerated depreciation | 8 | 0
Total | 12 | 2
Operating Segments | Prescription Technology Solutions |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | 0 | 0
Exit and other-related costs | 1 | 0
Asset impairments and accelerated depreciation | 17 | 0
Total | 18 | 0
Operating Segments | Medical-Surgical Solutions |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | 0 | 0
Exit and other-related costs | 2 | 3
Asset impairments and accelerated depreciation | 4 | 0
Total | 6 | 3
Operating Segments | International |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | 12 | 17
Exit and other-related costs | 14 | 2
Asset impairments and accelerated depreciation | 34 | 4
Total | 60 | 23
Corporate |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance and employee-related costs, net | 0 | 20
Exit and other-related costs | 21 | 7
Asset impairments and accelerated depreciation | 41 | 1
Total | $ 62 | $ 28

X
- Definition Asset Impairment Charges, Including Accelerated Depreciation + References No definition available. + Details
Name: | mck_AssetImpairmentChargesIncludingAcceleratedDepreciation
Namespace Prefix: | mck_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
Name: | us-gaap_BusinessExitCosts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringCharges
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_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
Name: | us-gaap_SeveranceCosts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mck_InternationalSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mck_USPharmaceuticalSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mck_PrescriptionTechnologySolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mck_MedicalSurgicalSolutionsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |