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Fair Value Measurements - Quantitative Information used in Valuing Level 3 Liabilities (Details) - Significant Unobservable Inputs (Level 3) $ in Millions	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Contingent Payment Obligations | Monte Carlo simulation
Quantitative information for Level 3 Fair Value Measurements Liabilities
Fair Value	$ 9.6	$ 14.7
Contingent Payment Obligations | Monte Carlo simulation | Volatility | Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.10	0.19
Contingent Payment Obligations | Monte Carlo simulation | Volatility | Maximum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.19	0.25
Contingent Payment Obligations | Monte Carlo simulation | Volatility | Weighted Average
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.13	0.21
Contingent Payment Obligations | Monte Carlo simulation | Discount rates | Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.06	0.06
Contingent Payment Obligations | Monte Carlo simulation | Discount rates | Weighted Average
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.06	0.06
Affiliate Equity Purchase Obligations | Discounted cash flow
Quantitative information for Level 3 Fair Value Measurements Liabilities
Fair Value	$ 37.7	$ 53.9
Affiliate Equity Purchase Obligations | Discounted cash flow | Discount rates | Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.14	0.14
Affiliate Equity Purchase Obligations | Discounted cash flow | Discount rates | Maximum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.18	0.17
Affiliate Equity Purchase Obligations | Discounted cash flow | Discount rates | Weighted Average
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.15	0.14
Affiliate Equity Purchase Obligations | Discounted cash flow | Growth rates | Minimum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	(0.05)	(0.06)
Affiliate Equity Purchase Obligations | Discounted cash flow | Growth rates | Maximum
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.08	0.07
Affiliate Equity Purchase Obligations | Discounted cash flow | Growth rates | Weighted Average
Quantitative information for Level 3 Fair Value Measurements Liabilities
Affiliate equity purchase obligations, measurement input	0.01	0.01

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Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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