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Intangible assets
 6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible assets
The Company's intangible assets consist of products acquired via business combinations or asset acquisitions. The following table summarizes the Company's Intangible assets, net:
June 30, 2022December 31, 2021
Asset TypeEstimated LifeCostAccumulated AmortizationNetCostAccumulated AmortizationNet
Products
9-22 years
$798.0 $221.4 $576.6 $798.0 $193.5 $604.5 
CDMO8 years5.5 5.5 — 5.5 5.4 0.1 
   Total intangible assets$803.5 $226.9 $576.6 $803.5 $198.9 $604.6 
Amortization expense associated with the Company's intangible assets was recorded as follows:
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Amortization Expense$14.0 $15.1 $28.0 $30.0 
As of June 30, 2022, the weighted average amortization period remaining for intangible assets was 11.4 years years.
The following table provides a roll forward of changes in our goodwill balance:
Goodwill, December 31, 2021
$224.9 
Foreign currency translation— 
Goodwill, June 30, 2022
$224.9 
The carrying amount of goodwill included accumulated impairments of $41.7 million as of June 30, 2022 and December 31, 2021, respectively.