Estimated Environmental Assessment And Cleanup Costs

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- Definition

Number of sites that hazardous substances were allegedly disposed at.

+ References

No definition available.

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- Definition

Loss Contingency, Number of Additional Defendants

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- Definition

Loss Contingency, Number of Cities Filed On Behalf Of

+ References

No definition available.

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- Definition

Loss Contingency Number of Relators

+ References

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- Definition

Loss Contingency Number of States Filed On Behalf Of

+ References

No definition available.

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- Definition

The number of sites requiring environmental conditions to be addressed.

+ References

No definition available.

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- Definition

Recorded amount of the accrual for a material component of an environmental loss contingency.

+ References

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- Definition

Undiscounted amount of the accrual for environmental loss contingencies.

+ References

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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

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.

+ References

No definition available.

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
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- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
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- Definition

Estimated time frame of disbursements over which the accrued or presently unrecognized amounts may be paid out for an individual site.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Topic 410
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-Section 50
-Paragraph 10
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-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859

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Commitments and Contingent Liabilities (Details) $ in Millions						1 Months Ended		12 Months Ended
	Apr. 03, 2018 state city	Dec. 30, 2017 investment_fund	Dec. 29, 2017 investment_fund	May 02, 2017 defendant	Apr. 16, 2013 state defendant relator	Sep. 30, 2017 state	Jan. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) site complaint	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Oct. 17, 2017 complaint
Loss Contingencies [Line Items]
Number of complaints served \| complaint								394
Payments for legal settlements								$ 0.0	$ 150.0	$ 0.0
Anti-Kickback Claim
Loss Contingencies [Line Items]
Number of relators \| relator					2
Number of states filed on behalf of \| state					21
Number of additional defendants \| defendant					5
Investigation into Factors Contributing to Increase in Opioid-related Hospitalizations and Deaths
Loss Contingencies [Line Items]
Number of states filed on behalf of \| state						40
Environmental Litigation
Loss Contingencies [Line Items]
Number of sites \| site								5
Remediation costs								$ 9.5
Hazardous substance sites, number \| site								14
Estimated environmental assessment and cleanup costs								$ 1,380.0
Estimated loss								$ 21.6
Environmental Litigation \| Minimum
Loss Contingencies [Line Items]
Time frame of disbursements								Apr. 01, 2018
Environmental Litigation \| Maximum
Loss Contingencies [Line Items]
Time frame of disbursements								Mar. 31, 2048
Polygon European Equity Opportunity Master Fund et al. v. McKesson Europe Holdings GmbH & Co. KGaA
Loss Contingencies [Line Items]
Number of plaintiffs \| investment_fund			2
Davidson Kempner International (BVI) Ltd. et al. v. McKesson Europe Holdings GmbH & Co. KGaA
Loss Contingencies [Line Items]
Number of plaintiffs \| investment_fund		4
Cherokee Nation v. AmerisourceBergen, et al.
Loss Contingencies [Line Items]
Number of additional defendants \| defendant				5
In re McKesson Corporation Stockholder Derivative Litigation
Loss Contingencies [Line Items]
Number of complaints served \| complaint												4
Drug Enforcement Administration, Department of Justice and U.S. Attorneys' Investigative Claims
Loss Contingencies [Line Items]
Litigation pre-tax charge											$ 150.0
Payments for legal settlements							$ 150.0
Subsequent Event \| United States ex rel. Omni Healthcare Inc. v. McKesson Corporation, et al.
Loss Contingencies [Line Items]
Number of states filed on behalf of \| state	30
Number of cities filed on behalf of \| city	2