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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis
The following tables summarize financial assets and liabilities that are measured at fair value on a recurring basis:
  Fair Value Measurements
 December 31, 2021
 Level 1Level 2Level 3
Financial Assets    
Investments in equity securities(1)
$64.5 $64.5 $— $— 
Investments in debt securities(1)
14.0 — 14.0 — 
Derivative financial instruments(2)
0.9 — 0.9 — 
Financial Liabilities(3)
    
Contingent payment obligations$40.3 $— $— $40.3 
Affiliate equity purchase obligations12.6 — — 12.6 
Derivative financial instruments0.8 — 0.8 — 
  Fair Value Measurements
 December 31, 2022
 Level 1Level 2Level 3
Financial Assets    
Investments in equity securities(1)
$447.9 $305.6 $142.3 $— 
Investments in debt securities(1)
269.0 — 269.0 — 
Derivative financial instruments(2)
0.5 — 0.5 — 
Financial Liabilities(3)
    
Contingent payment obligations$21.0 $— $— $21.0 
Affiliate equity purchase obligations24.5 — — 24.5 
Derivative financial instruments0.9 — 0.9 — 
__________________________
(1)Amounts are presented within Investments in marketable securities.
(2)Amounts are presented within Other assets.
(3)Amounts are presented within Other liabilities.
Schedule of Changes in Level 3 Financial Liabilities
The following table presents the changes in level 3 liabilities:
For the Years Ended December 31,
20212022
Contingent Payment ObligationsAffiliate
Equity Purchase Obligations
Contingent Payment ObligationsAffiliate
Equity Purchase Obligations
Balance, beginning of period$— $22.0 $40.3 $12.6 
Purchases and issuances(1)
23.7 112.7 — 75.8 
Settlements and reductions— (120.7)— (52.1)
Net realized and unrealized (gains) losses(2)
16.6 (1.4)(19.3)(11.8)
Balance, end of period$40.3 $12.6 $21.0 $24.5 
Net change in unrealized gains relating to instruments still held at the reporting date$— $— $(19.3)$(5.9)
__________________________
(1)Affiliate equity purchase obligation activity includes transfers from Redeemable non-controlling interests.
(2)Gains and losses resulting from changes to expected payments are included in Other expenses (net) and the accretion of these obligations is included in Interest expense.
Schedule of Quantitative Information
The following table presents certain quantitative information about the significant unobservable inputs used in valuing the Company’s recurring level 3 fair value measurements:
 Quantitative Information About Level 3 Fair Value Measurements
December 31, 2021December 31, 2022
 Valuation
Techniques
Unobservable InputFair ValueRange
Weighted Average(1)
Fair ValueRange
Weighted Average(1)
Contingent payment obligationsMonte Carlo simulationVolatility$40.3 
13% - 25%
13 %$21.0 
18% - 25%
18 %
 Discount rates 
1% - 2%
%
6%
%
Affiliate equity purchase obligationsDiscounted cash flow
Growth rates(2)
$12.6 
(13)% - 7%
%$24.5 
(3)% - 6%
%
 Discount rates 
15% - 18%
15 %
14% - 17%
14 %
__________________________
(1)Calculated by comparing the relative fair value of an obligation to its respective total.
(2)Represents growth rates of asset- and performance-based fees.
Schedule of Financial Liabilities not Carried at Fair Value The following table summarizes the Company’s other financial liabilities not carried at fair value:
 December 31, 2021December 31, 2022
Carrying ValueFair ValueCarrying ValueFair ValueFair Value Hierarchy
Senior notes$1,098.0 $1,165.6 $1,098.7 $1,024.6 Level 2
Junior subordinated notes765.8 809.1 765.9 552.3 Level 2
Junior convertible securities299.5 461.4 341.7 346.9 Level 2