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Fair Value
12 Months Ended
Dec. 31, 2021
Fair Value [Abstract]  
Fair Value Fair ValueFinancial assets and liabilities measured at fair value on a recurring basis were (in millions):
December 31, 2021Level 1Level 2Level 3Total
Assets:    
Cash and cash equivalents$5,316.8  $5,316.8 
Marketable equity securities1.1 1.1 
Foreign currency derivatives$0.3 0.3 
Liabilities:   
Foreign currency derivatives$0.1 $0.1 
Contingent purchase price obligations$167.1 167.1 
December 31, 2020
Assets:
Cash and cash equivalents$5,600.5  $5,600.5 
Marketable equity securities1.6  1.6 
Foreign currency derivatives$0.6 0.6 
Liabilities: 
Foreign currency derivatives0.3 0.3 
Contingent purchase price obligations$71.9 71.9 
Changes in contingent purchase price obligations were (in millions):
December 31,
20212020
January 1$71.9 $107.7 
Acquisitions120.4 14.4 
Revaluation and interest0.4 (21.9)
Payments(22.6)(31.3)
Foreign currency translation(3.0)3.0 
December 31$167.1 $71.9 
The carrying amount and fair value of our financial assets and liabilities were (in millions):
December 31,
 20212020
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Assets:    
Cash and cash equivalents$5,316.8 $5,316.8 $5,600.5 $5,600.5 
Marketable equity securities1.1 1.1 1.6 1.6 
Non-marketable equity securities6.5 6.5 8.9 8.9 
Foreign currency derivatives0.3 0.3 0.6 0.6 
Liabilities:    
Short-term debt$9.6 $9.6 $3.9 $3.9 
Foreign currency derivatives0.1 0.1 0.3 0.3 
Contingent purchase price obligations167.1 167.1 71.9 71.9 
Long-term debt5,685.7 6,011.6 5,807.3 6,380.6 
The estimated fair value of the foreign currency derivative instruments is determined using model-derived valuations, taking into consideration foreign currency 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.