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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Capitalized interest costs $ 15.4 $ 12.0
Change in due to related party 0.0 0.0 [1]
Gain on settlement of long term supply agreement 2.0  
2019 Federal Income Tax Return    
Change in due to related party   1.6
2018 Federal Income Tax Return    
Change in due to related party   1.9
Separation Steps    
Change in due to related party   $ (4.6)
State And Foreign Tax Authority    
Income tax refunds $ 1.7  
[1] As adjusted for the adoption of ASU 2020-06 using the full retrospective method.