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Fair Value | 9 Months Ended
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Sep. 30, 2024
Fair Value [Abstract] |
Fair Value | Fair Value Financial assets and liabilities are recorded at fair value based on the following: •Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities. •Level 2: Unadjusted quoted prices in active markets for similar assets or liabilities; unadjusted quoted prices for identical assets or liabilities in markets that are not active; and model-derived valuations with observable inputs. •Level 3: Unobservable inputs for the asset or liability. Financial assets and liabilities measured at fair value on a recurring basis:
| September 30, 2024 |  |  | December 31, 2023
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 3,533.9 |  |  |  |  |  |  | $ | 3,533.9 |  |  |  | $ | 4,432.0 |  |  |  |  |  |  | $ | 4,432.0 |
Marketable equity securities | 1.0 |  |  |  |  |  |  | 1.0 |  |  |  | 0.9 |  |  |  |  |  |  | 0.9 |
Foreign currency derivatives |  |  | $ | 0.3 |  |  |  |  | 0.3 |  |  |  |  |  | $ | — |  |  |  |  | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cross currency swaps - net investment hedge |  |  | $ | 0.6 |  |  |  |  | $ | 0.6 |  |  |  |  |  | $ | 6.6 |  |  |  |  | $ | 6.6 |
Contingent purchase price obligations |  |  |  |  | $ | 236.4 |  |  | 236.4 |  |  |  |  |  |  |  | $ | 229.5 |  |  | 229.5 |
Changes in contingent purchase price obligations:
| Nine Months Ended September 30,
| 2024 |  | 2023
January 1 | $ | 229.5 |  |  | $ | 115.0 |
Acquisitions | 28.5 |  |  | 230.0 |
Revaluation and interest | 1.9 |  |  | (18.2) |
Payments | (23.6) |  |  | (34.8) |
Foreign currency translation | 0.1 |  |  | 0.2 |
September 30 | $ | 236.4 |  |  | $ | 292.2 |
Carrying amount and fair value of our financial assets and liabilities:
| September 30, 2024 |  | December 31, 2023
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Assets: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 3,533.9 |  |  | $ | 3,533.9 |  |  | $ | 4,432.0 |  |  | $ | 4,432.0 |
Marketable equity securities | 1.0 |  |  | 1.0 |  |  | 0.9 |  |  | 0.9 |
Non-marketable equity securities | 11.2 |  |  | 11.2 |  |  | 6.7 |  |  | 6.7 |
Foreign currency derivatives | 0.3 |  |  | 0.3 |  |  | — |  |  | — |
Liabilities: |  |  |  |  |  |  |
Short-term debt | $ | 16.9 |  |  | $ | 16.9 |  |  | $ | 10.9 |  |  | $ | 10.9 |
Cross currency swaps - net investment hedge | 0.6 |  |  | 0.6 |  |  | 6.6 |  |  | 6.6 |
Contingent purchase price obligations | 236.4 |  |  | 236.4 |  |  | 229.5 |  |  | 229.5 |
Long-term debt | 6,930.1 |  |  | 6,676.3 |  |  | 5,639.6 |  |  | 5,237.8 |
The estimated fair value of the foreign currency derivatives and the cross-currency swaps are determined using model-derived valuations, taking into consideration foreign currency rates, interest rates, and counterparty credit risk. The estimated fair value of the contingent purchase price obligations is calculated in accordance with the terms of each acquisition agreement and is discounted. The fair value of long-term debt is based on quoted market prices.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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