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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis | The following tables summarize the Company’s financial assets and liabilities that are measured at fair value on a recurring basis:
|  |  | Fair Value Measurements
| December 31, 2020 |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Financial Assets |  |  |  |  |  |  |
Investments in marketable securities | $ | 74.9 |  |  | $ | 25.7 |  |  | $ | 49.2 |  |  | $ | — |
Derivative financial instruments(1) | 3.5 |  |  | — |  |  | 3.5 |  |  | — |
Financial Liabilities(2) |  |  |  |  |  |  |
Affiliate equity purchase obligations | $ | 22.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 22.0 |
Derivative financial instruments | 4.2 |  |  | — |  |  | 4.2 |  |  | — |
|  |  | Fair Value Measurements
| March 31, 2021 |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Financial Assets |  |  |  |  |  |  |
Investments in marketable securities | $ | 108.8 |  |  | $ | 34.3 |  |  | $ | 74.5 |  |  | $ | — |
Derivative financial instruments(1) | 1.9 |  |  | — |  |  | 1.9 |  |  | — |
Financial Liabilities(2) |  |  |  |  |  |  |
Affiliate equity purchase obligations | $ | 66.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 66.1 |
Derivative financial instruments | 2.0 |  |  | — |  |  | 2.0 |  |  | — |
__________________________ (1)Amounts are presented within Other assets on the Consolidated Balance Sheets. (2)Amounts are presented within Other liabilities on the Consolidated Balance Sheets.
Schedule of Changes in Level 3 Liabilities for Affiliate Equity Repurchase Obligation | The following table presents the changes in level 3 liabilities for Affiliate equity purchase obligations:
| For the Three Months Ended March 31,
| 2020 |  | 2021
Balance, beginning of period | $ | 19.8 |  |  | $ | 22.0 |
Net realized and unrealized (gains) losses(1) | (1.5) |  |  | 0.9 |
Purchases and issuances(2) | 194.0 |  |  | 70.7 |
Settlements and reductions | (97.2) |  |  | (27.5) |
Balance, end of period | $ | 115.1 |  |  | $ | 66.1 |
Net change in unrealized (gains) losses relating to instruments still held at the reporting date | $ | — |  |  | $ | — |
___________________________ (1)Accretion expense for these arrangements and obligations is recorded in Interest expense in the Consolidated Statements of Income. (2)Includes transfers from Redeemable non-controlling interests.
Schedule of Quantitative Information used in Valuing Level 3 Liabilities | The following table presents certain quantitative information about the significant unobservable inputs used in valuing the Company’s level 3 fair value measurements:
| Quantitative Information About Level 3 Fair Value Measurements
|  |  |  |  | December 31, 2020 |  | March 31, 2021
| Valuation Techniques |  | Unobservable Input |  | Fair Value |  | Range |  | Weighted Average(1) |  | Fair Value |  | Range |  | Weighted Average(1)
Affiliate equity purchase obligations | Discounted cash flow |  | Growth rates(2) |  | $ | 22.0 |  |  | (5)% - 8% |  | 3 | % |  | $ | 66.1 |  |  | (1)% - 8% |  | 4 | %
|  |  | Discount rates |  |  |  | 14% - 16% |  | 15 | % |  |  |  | 14% - 16% |  | 15 | %
___________________________ (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 Assets and Liabilities Not Carried at Fair Value | The following table summarizes the Company’s other financial liabilities not carried at fair value:
| December 31, 2020 |  | March 31, 2021 |  |
| Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value |  | Fair Value Hierarchy
Senior notes | $ | 1,097.3 |  |  | $ | 1,206.6 |  |  | $ | 1,097.5 |  |  | $ | 1,180.2 |  |  | Level 2
Junior convertible securities | 318.4 |  |  | 427.6 |  |  | 308.8 |  |  | 459.9 |  |  | Level 2
Junior subordinated notes | 565.7 |  |  | 623.1 |  |  | 565.8 |  |  | 593.0 |  |  | Level 2

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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