Income Taxes	9 Months Ended
Dec. 31, 2019
Income Taxes [Abstract]
Income Taxes	6. Income Taxes Income tax expense for the three months ended December 31, 2019 was $15,240, compared to an income tax benefit of $5,080 for the three months ended December 31, 2018, which represents an effective tax rate of 23.1% and 29.1%, respectively. The income tax benefit for the nine months ended December 31, 2019 and 2018 was $564 and $16,664, respectively, which represents an effective tax rate of 0.7% and 25.6%, respectively. Fluctuations in our reported income tax rates from the statutory rate are primarily due to benefits recognized as a result of certain incentive tax credits resulting from research and experimental expenditures and discrete items recognized in the quarters. McKesson Tax Receivable Agreement In connection with the closing of the Transactions, the Joint Venture, subsidiaries of McKesson that serve as members of the Joint Venture (the “McK Members”), McKesson and the Company entered into a tax receivable agreement (the “McKesson Tax Receivable Agreement”). The McKesson Tax Receivable Agreement generally provides for the payment by the Joint Venture to the McK Members and it assigns 85% of the net cash tax savings realized (or, in certain circumstances, deemed to be realized) by the Company in periods ending on or after the date on which McKesson ceases to own at least 20% of the outstanding units of the Joint Venture (the “LLC Units”) as a result of (i) certain amortizable tax basis in assets transferred to the Joint Venture at the closing of the Transactions and (ii) imputed interest deductions and certain other tax attributes arising from payments under the McKesson Tax Receivable Agreement. Additionally, upon the occurrence of the first exchange of LLC Units by McKesson (or its permitted transferees), if any, the Company has agreed to enter into an additional tax receivable agreement with the McK Members, pursuant to which the Company would be required to pay to the relevant McK Member 85% of the net cash tax savings, if any, arising from the Company’s utilization of (i) certain tax basis increases resulting from the relevant exchange and payments under such additional tax receivable agreement and (ii) imputed interest deductions. The Company may also be required to enter into and make payments under an additional tax receivable agreement with McKesson in certain circumstances. Because payments under the McKesson Tax Receivable Agreement are contingent upon McKesson’s ceasing to own at least 20% of the Joint Venture and such an event was not probable at the inception of the McKesson Tax Receivable Agreement or as of December 31, 2019, no related obligation has been reflected on the accompanying condensed balance sheet. Letter Agreement The Company, the Joint Venture, McKesson and certain of McKesson’s affiliates have entered into a letter agreement relating to the Contribution Agreement (the “Letter Agreement”). The Letter Agreement addresses miscellaneous tax-related matters, including (i) technical clarifications and modifications to the manner in which the Joint Venture allocates certain items of taxable income, loss and deduction among, and calculates and makes required tax distributions to, its members, (ii) the sharing of certain contingent tax benefits and expenses not addressed by the McKesson Tax Receivable Agreement or the tax matters agreement that the Company will enter into with McKesson in connection with a spin-off or split-off transaction (or a combination of the foregoing) that McKesson may, at its election, initiate and complete that would result, among other things, in the acquisition by the Company of all of McKesson’s LLC Units and the issuance by the Company to McKesson and/or McKesson’s securityholders of an equal number of shares of its common stock and (iii) procedures applicable in the case of certain tax proceedings. In particular, pursuant to the terms of the Letter Agreement, McKesson may adjust the manner in which depreciation or amortization deductions in respect of assets transferred to the Joint Venture at the closing of the Transactions are allocated among the Company, McKesson and certain of McKesson’s affiliates beyond minimum amounts provided in the LLC Agreement. If an amount of deductions is allocated to the Company in excess of a specified minimum threshold, the Company will be required to make cash payments to McKesson equal to 100% of the tax savings of the Company attributable to such excess deductions for any tax period ending prior to the date on which McKesson ceases to own at least 20% of the outstanding LLC Units of the Joint Venture, after which the terms of the McKesson Tax Receivable Agreement will control. At December 31, 2019, the Company has recorded a liability to McKesson equal to $47,172, which reflects the amount payable for future tax savings the Company anticipates receiving as a result of deductions which were allocated by McKesson to the Company for the year ended March 31, 2019 and is reflected as Due to McKesson on the consolidated balance sheet.

6. Income Taxes

Income tax expense for the three months ended December 31, 2019 was $15,240, compared to an income tax benefit of $5,080 for the three months ended December 31, 2018, which represents an effective tax rate of 23.1% and 29.1%, respectively. The income tax benefit for the nine months ended December 31, 2019 and 2018 was $564 and $16,664, respectively, which represents an effective tax rate of 0.7% and 25.6%, respectively.

Fluctuations in our reported income tax rates from the statutory rate are primarily due to benefits recognized as a result of certain incentive tax credits resulting from research and experimental expenditures and discrete items recognized in the quarters.

McKesson Tax Receivable Agreement

In connection with the closing of the Transactions, the Joint Venture, subsidiaries of McKesson that serve as members of the Joint Venture (the “McK Members”), McKesson and the Company entered into a tax receivable agreement (the “McKesson Tax Receivable Agreement”). The McKesson Tax Receivable Agreement generally provides for the payment by the Joint Venture to the McK Members and it assigns 85% of the net cash tax savings realized (or, in certain circumstances, deemed to be realized) by the Company in periods ending on or after the date on which McKesson ceases to own at least 20% of the outstanding units of the Joint Venture (the “LLC Units”) as a result of (i) certain amortizable tax basis in assets transferred to the Joint Venture at the closing of the Transactions and (ii) imputed interest deductions and certain other tax attributes arising from payments under the McKesson Tax Receivable Agreement. Additionally, upon the occurrence of the first exchange of LLC Units by McKesson (or its permitted transferees), if any, the Company has agreed to enter into an additional tax receivable agreement with the McK Members, pursuant to which the Company would be required to pay to the relevant McK Member 85% of the net cash tax savings, if any, arising from the Company’s utilization of (i) certain tax basis increases resulting from the relevant exchange and payments under such additional tax receivable agreement and (ii) imputed interest deductions. The Company may also be required to enter into and make payments under an additional tax receivable agreement with McKesson in certain circumstances.

Because payments under the McKesson Tax Receivable Agreement are contingent upon McKesson’s ceasing to own at least 20% of the Joint Venture and such an event was not probable at the inception of the McKesson Tax Receivable Agreement or as of December 31, 2019, no related obligation has been reflected on the accompanying condensed balance sheet.

Letter Agreement

The Company, the Joint Venture, McKesson and certain of McKesson’s affiliates have entered into a letter agreement relating to the Contribution Agreement (the “Letter Agreement”). The Letter Agreement addresses miscellaneous tax-related matters, including (i) technical clarifications and modifications to the manner in which the Joint Venture allocates certain items of taxable income, loss and deduction among, and calculates and makes required tax distributions to, its members, (ii) the sharing of certain contingent tax benefits and expenses not addressed by the McKesson Tax Receivable Agreement or the tax matters agreement that the Company will enter into with McKesson in connection with a spin-off or split-off transaction (or a combination of the foregoing) that McKesson may, at its election, initiate and complete that would result, among other things, in the acquisition by the Company of all of McKesson’s LLC Units and the issuance by the Company to McKesson and/or McKesson’s securityholders of an equal number of shares of its common stock and (iii) procedures applicable in the case of certain tax proceedings. In particular, pursuant to the terms of the Letter Agreement, McKesson may adjust the manner in which depreciation or amortization deductions in respect of assets transferred to the Joint Venture at the closing of the Transactions are allocated among the Company, McKesson and certain of McKesson’s affiliates beyond minimum amounts provided in the LLC Agreement. If an amount of deductions is allocated to the Company in excess of a specified minimum threshold, the Company will be required to make cash payments to McKesson equal to 100% of the tax savings of the Company attributable to such excess deductions for any tax period ending prior to the date on which McKesson ceases to own at least 20% of the outstanding LLC Units of the Joint Venture, after which the terms of the McKesson Tax Receivable Agreement will control. At December 31, 2019, the Company has recorded a liability to McKesson equal to $47,172, which reflects the amount payable for future tax savings the Company anticipates receiving as a result of deductions which were allocated by McKesson to the Company for the year ended March 31, 2019 and is reflected as Due to McKesson on the consolidated balance sheet.