Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
KFPC \| Variable Interest Entity, Primary Beneficiary
Related Party Transaction [Line Items]
Due to related parties	$ 2.5	$ 2.3
Ownership percentage	50.00%
Purchases from related party	$ 49.1	47.6	$ 48.5
Styrenic Block Copolymer Joint Venture
Related Party Transaction [Line Items]
Percentage of equity investment	50.00%
Due to related parties	$ 14.8	14.8
Amounts of transaction	$ 30.0	$ 28.4	$ 33.0

Carrying amount as of the balance sheet date of obligations due all related parties.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details