Organization Consolidation And Presentation Of Financial Statements [Line Items]

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- Definition

Proceeds from Issuance of Debt and Common Stock, Net of Issuance Costs

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- Definition

Tangible Equity Units, Issued During Period, New Issues

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Aggregate number of common shares reserved for future issuance.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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- Definition

Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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- Definition

Cumulative number of shares issued or sold by the subsidiary or equity method investee on all stock transactions.

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No definition available.

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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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Nature of Business and Organization - (Narrative) (Detail) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Jul. 01, 2019 USD ($) shares	Jun. 26, 2019 $ / shares shares	Jul. 31, 2019 USD ($) shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) $ / shares shares	Mar. 31, 2018 $ / shares shares
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership percentage in Joint Venture	41.00%				41.00%	30.00%
Payment to acquire joint venture \| shares						37,920,000
Stated interest rate				5.50%	5.50%
Stock split conversion ratio		126.4
Common Stock, shares authorized \| shares		9,000,000,000		9,000,000,000	9,000,000,000	252,800,000	252,800,000
Common Stock, par value \| $ / shares		$ 0.001		$ 0.001	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized \| shares		900,000,000		900,000,000	900,000,000	0
Preferred stock, par value \| $ / shares		$ 0.001		$ 0.001	$ 0.001	$ 0.001
Shares received from Joint Venture \| shares	49,285,713
Proceeds from initial public offering					$ 608,679
Proceeds from tangible equity units			$ 278,875		278,875
5.75% senior notes due 2025 [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Senior note issued						$ 1,000,000
Stated interest rate						5.75%
Joint Venture [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Repayment of debt	$ 805,000			$ 97,750	$ 902,750
Term Loan Facility [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Line of credit						$ 5,100,000
Revolving Credit Facility [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Line of credit						$ 500,000
2009 Stock Incentive Plan [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Payment to acquire joint venture \| shares						1,800,000,000
Common Class X [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Common Stock, shares authorized \| shares		1		1	1	1	1
Common Stock, par value \| $ / shares		$ 0.001		$ 0.001	$ 0.001	$ 0.001	$ 0.001
Common Stock [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Shares received from Joint Venture \| shares	49,285,713
Proceeds from initial public offering	$ 608,679
Tangible Equity Units [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Tangible equity unit offering \| shares	5,750,000		5,750,000
Proceeds from tangible equity units	$ 278,875
McKesson Corporation [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership percentage in Joint Venture					59.00%	70.00%
McKesson Corporation [Member] \| Promissory Note [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Promissory note						$ 1,300,000