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Income Taxes - Schedule of Components of Company's Net Deferred Tax Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Non-current deferred tax liabilities: |  |
Intangible assets | $ 700.7 | $ 631.6
Fixed assets | 23.0 | 21.1
Right-of-use assets | 43.1 | 48.3
Net unrealized holding (loss)/gain on available-for-sale securities | (0.3) | (0.4)
Total non-current deferred tax liabilities | 791.5 | 720.4
Non-current deferred tax assets: |  |
Deferred compensation | 85.1 | 67.4
Accruals and reserves | 19.4 | 12.5
Lease liabilities | 48.9 | 54.6
Net operating loss carryforwards and other carryforwards | 23.3 | 3.0
Valuation allowance for deferred tax assets | (1.4) | (1.1)
Total non-current deferred tax assets | 175.3 | 136.4
Net non-current deferred tax liability | 616.2 | 584.0
Accounting Standards Update 2014-09 |  |
Non-current deferred tax liabilities: |  |
Deferred Tax Liabilities, Other | $ 25.0 | $ 19.8

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