XML 65 R55.htm IDEA: XBRL DOCUMENT v3.22.2.2
Investments in Unconsolidated Affiliates - Americas Styrenics (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Investments in Unconsolidated Affiliates          
Investments in unconsolidated affiliates $ 269.2   $ 269.2   $ 247.8
AmSty          
Investments in Unconsolidated Affiliates          
Investments in unconsolidated affiliates $ 269.2   $ 269.2   $ 247.8
Percentage of ownership underlying net assets 50.00%   50.00%   50.00%
Amortized weighted average remaining useful life     2.3    
Dividends received from operating activities $ 25.0 $ 20.0 $ 62.5 $ 60.0  
Unconsolidated affiliates          
Investments in Unconsolidated Affiliates          
Investment in unconsolidated affiliates-difference between carrying amount and underlying equity $ 11.0   $ 11.0   $ 9.4