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Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Compensation and staff benefits | [1] | $ 64.5 | $ 59.8
Loss carryforwards(1) | [2] | 127.6 | 88.4
Accrued liabilities |  | 8.0 | 7.0
Lease liabilities |  | 18.7 | 16.8
Other |  | (2.1) | 5.3
Gross deferred tax assets |  | 216.7 | 177.3
Valuation allowance |  | (119.4) | (76.8)
Deferred tax assets, net of valuation allowance |  | 97.3 | 100.5
Retirement benefits |  | (17.4) | (21.4)
Goodwill and acquired intangible assets |  | (628.9) | (628.6)
Lease ROU assets |  | (18.0) | (16.2)
Other |  | (1.3) | (3.5)
Gross deferred tax liabilities |  | (665.6) | (669.7)
Total deferred tax liabilities(2) |  | (568.3) | (569.2)
Deferred tax liabilities, net |  | (569.3) | (570.8)
Total deferred tax liabilities |  | (568.3) | (569.2)
Other Noncurrent Assets [Member] |  |  |
Deferred tax assets, net (included in other non-current assets) |  | $ 1.0 | $ 1.6
[1] | The majority of the 2023 loss carryforward relates to the UK capital loss of $294.7 million, before tax effects, which may be carried forward without time limitation. There is a full valuation allowance against UK capital losses.
[2] | The change in the net deferred tax liabilities does not equal the deferred tax expense due to the foreign currency translation adjustment on deferred tax liabilities booked through equity.

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