Equity Method Investment in Change Healthcare LLC (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2019	Dec. 31, 2020
Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Write-off of basis differences within Loss from Equity Method Investment in the Joint Venture	$ 8,764	$ 104,497

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.

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