Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Changes in Carrying Amount of Goodwill by Operating Segment
Goodwill as of March 31, 2020 and December 31, 2019 and changes in the carrying amount of goodwill by segment were as follows: 
(In millions)Specialty Engineered MaterialsColor, Additives and InksPolyOne DistributionTotal
Balance at December 31, 2019$236.3  $447.8  $1.6  $685.7  
Currency translation(1.0) (0.5) —  (1.5) 
Balance at March 31, 2020$235.3  $447.3  $1.6  $684.2  
Schedule of Finite-Lived Intangible Assets
Indefinite and finite-lived intangible assets consisted of the following: 
 As of March 31, 2020
(In millions)Acquisition CostAccumulated AmortizationCurrency TranslationNet
Customer relationships$286.8  $(92.6) $(1.2) $193.0  
Patents, technology and other244.0  (83.4) (1.7) 158.9  
Indefinite-lived trade names109.5  —  —  109.5  
Total$640.3  $(176.0) $(2.9) $461.4  

 As of December 31, 2019
(In millions)Acquisition CostAccumulated AmortizationCurrency TranslationNet
Customer relationships$286.8  $(89.1) $(1.0) $196.7  
Patents, technology and other244.0  (79.6) (1.3) 163.1  
Indefinite-lived trade names109.5  —  —  109.5  
Total$640.3  $(168.7) $(2.3) $469.3  
Schedule of Indefinite-Lived Intangible Assets
Indefinite and finite-lived intangible assets consisted of the following: 
 As of March 31, 2020
(In millions)Acquisition CostAccumulated AmortizationCurrency TranslationNet
Customer relationships$286.8  $(92.6) $(1.2) $193.0  
Patents, technology and other244.0  (83.4) (1.7) 158.9  
Indefinite-lived trade names109.5  —  —  109.5  
Total$640.3  $(176.0) $(2.9) $461.4  

 As of December 31, 2019
(In millions)Acquisition CostAccumulated AmortizationCurrency TranslationNet
Customer relationships$286.8  $(89.1) $(1.0) $196.7  
Patents, technology and other244.0  (79.6) (1.3) 163.1  
Indefinite-lived trade names109.5  —  —  109.5  
Total$640.3  $(168.7) $(2.3) $469.3