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Equity Acquisition and Business Combination - Narrative (Details) £ in Millions, $ in Millions |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2021 GBP (£) | Aug. 31, 2021 USD ($) | Mar. 01, 2020 GBP (£) | Mar. 01, 2020 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 01, 2020 USD ($) | Jul. 01, 2018
H G P E Capital Limited |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest acquired |  |  | 100.00% |  |  |  | 100.00% |
Acquisition price |  |  | £ 15.9 | $ 20.4 |  |  |  |
Payments to acquire business |  |  | 11.2 | 14.3 |  |  |  |
Maximum contingent purchase price payments |  |  | £ 3.5 |  |  |  | $ 4.5 |
Business combination, provisional information adjustments, assets |  |  |  |  | $ 25.8 |  |  |
Business combination, provisional information adjustments, liabilities |  |  |  |  | 17.2 |  |  |
Business combination, provisional information adjustments, equity interests |  |  |  |  | 8.6 |  |  |
Revenue |  |  |  |  | 6.9 |  |  |
Compensation and related expense |  |  |  |  | $ 6.9 |  |  |
Hermes G P E |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition-date fair value of previous equity interest |  |  |  | $ 34.5 |  |  |  |
Gain as a result of remeasuring prior equity interest |  |  |  |  |  | $ 7.5 |  |
HFML |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Additional equity interests acquired | 29.50% | 29.50% |  |  |  |  |  |
Purchase price for acquisition of additional equity | £ 116.5 | $ 160.2 |  |  |  |  |  |
Ownership interest acquired |  |  |  |  |  |  |  | 60.00%
Percentage of equity interests held in employee benefit trust | 10.00% | 10.00% |  |  |  |  |  |

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