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Stockholders' Equity - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 09, 2020 shares | Jul. 31, 2021 $ / shares | Jun. 30, 2021 $ / shares | Mar. 31, 2022 vote $ / shares | Mar. 31, 2021 $ / shares | Mar. 31, 2020 $ / shares | Mar. 10, 2020 $ / shares shares
Dividends Payable [Line Items] |  |  |  |  |  |  |
Number of votes | vote |  |  |  | 1 |  |  |
Cash dividends declared per common share (in dollars per share) | $ / shares |  | $ 0.47 | $ 0.42 | $ 1.83 | $ 1.67 | $ 1.62 |
Common stock, par value (in dollars per share) | $ / shares |  |  |  | $ 0.01 | $ 0.01 |  |
Change Healthcare |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |
Shares repurchased (in shares) | 15,400,000 |  |  |  |  |  |
Separation of Change Healthcare JV |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |
Shares distributed to stockholders (in shares) | 176,000,000 |  |  |  |  |  |
Shares of common stock exchanged (in shares) | 15,400,000 |  |  |  |  |  |
Number of shares converted into per share converted (shares) |  |  |  |  |  |  | 1
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 0.001

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