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v2.4.1.9

Noncontrolling Interests Noncontrolling Interests (Ownership Changes) (Narrative) (Details) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 USD ($) | Mar. 31, 2015 Celesio [Member] USD ($) | Jun. 30, 2014 Celesio [Member] USD ($) | Jun. 30, 2014 Celesio [Member] EUR (€) | Mar. 31, 2014 Celesio [Member]
Noncontrolling Interest [Line Items] |  |  |  |  |
NCI ownership interest, parent |  | 76.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = mck_CelesioMember |  |  | 75.40%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = mck_CelesioMember
NCI shares acquired, cash paid |  | $ 8mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentConsiderationPaid / dei_LegalEntityAxis = mck_CelesioMember | $ 32mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentConsiderationPaid / dei_LegalEntityAxis = mck_CelesioMember |  |
NCI shares acquired |  | 0.3mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentCommonShares / dei_LegalEntityAxis = mck_CelesioMember | 1.0mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentCommonShares / dei_LegalEntityAxis = mck_CelesioMember |  |
Tender offer price per share |  |  |  | € 23.50mck_BusinessAcquisitionTenderOfferPrice / dei_LegalEntityAxis = mck_CelesioMember |
NCI shares acquired, change in ownership percentage |  |  | 0.50%mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentPercent / dei_LegalEntityAxis = mck_CelesioMember |  |
NCI change from shares acquired | 62us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent | 9us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent / dei_LegalEntityAxis = mck_CelesioMember | 35us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent / dei_LegalEntityAxis = mck_CelesioMember |  |
NCI shares acquired, change in APIC | 2mck_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIncreaseInPaidInCapital |  |  |  |
NCI shares acquired, change in parent net income and transfers to NCI | $ 1,474us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet |  |  |  |

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- Definition Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Increase In Paid In Capital. + References No definition available. + Details
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- Definition Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Purchase Of Interest By Parent Common Shares + References No definition available. + Details
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- Definition Consolidation, Less Than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase Of Interest By Parent, Consideration Paid + References No definition available. + Details
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- Definition Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Purchase Of Interest By Parent Percent + References No definition available. + Details
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- Definition This element represents the total net income attributable to the parent for the period and the effect of net changes during the period impacting the parent's ownership interest in a subsidiary as it relates to the total (consolidated) equity attributable to the parent. The changes to the parent's ownership interest in a subsidiary represented by this element did not result in a deconsolidation of the subsidiary from the consolidated financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591554-111686 + Details
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- Definition Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591554-111686 + Details
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- Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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