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Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financial Liabilities |  |
Contingent payment obligations | $ 21.0 |
Fair Value Measured on a Recurring Basis |  |
Financial Assets |  |
Investments in equity securities | 447.9 | $ 64.5
Investments in debt securities | 269.0 | 14.0
Derivative financial instruments | 0.5 | 0.9
Financial Liabilities |  |
Contingent payment obligations | 21.0 | 40.3
Affiliate equity purchase obligations | 24.5 | 12.6
Derivative financial instruments | 0.9 | 0.8
Fair Value Measured on a Recurring Basis | Level 1 |  |
Financial Assets |  |
Investments in equity securities | 305.6 | 64.5
Investments in debt securities | 0.0 | 0.0
Derivative financial instruments | 0.0 | 0.0
Financial Liabilities |  |
Contingent payment obligations | 0.0 | 0.0
Affiliate equity purchase obligations | 0.0 | 0.0
Derivative financial instruments | 0.0 | 0.0
Fair Value Measured on a Recurring Basis | Level 2 |  |
Financial Assets |  |
Investments in equity securities | 142.3 | 0.0
Investments in debt securities | 269.0 | 14.0
Derivative financial instruments | 0.5 | 0.9
Financial Liabilities |  |
Contingent payment obligations | 0.0 | 0.0
Affiliate equity purchase obligations | 0.0 | 0.0
Derivative financial instruments | 0.9 | 0.8
Fair Value Measured on a Recurring Basis | Level 3 |  |
Financial Assets |  |
Investments in equity securities | 0.0 | 0.0
Investments in debt securities | 0.0 | 0.0
Derivative financial instruments | 0.0 | 0.0
Financial Liabilities |  |
Contingent payment obligations | 21.0 | 40.3
Affiliate equity purchase obligations | 24.5 | 12.6
Derivative financial instruments | $ 0.0 | $ 0.0

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