XML 91 R71.htm IDEA: XBRL DOCUMENT v3.22.4
Investments in Unconsolidated Affiliates - Americas Styrenics (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Investments in Unconsolidated Affiliates      
Investments in unconsolidated affiliates $ 255.1 $ 247.8 $ 240.1
AmSty      
Investments in Unconsolidated Affiliates      
Investments in unconsolidated affiliates 255.1 247.8  
Investment in unconsolidated affiliates-difference between carrying amount and underlying equity $ 8.4 9.4  
Percentage of ownership underlying net assets 50.00%    
Amortized weighted average remaining useful life 2.1    
Dividends received from operating activities $ 95.0 $ 85.0 $ 15.0