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Subsequent Events (Details) - Prime Turbines - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2020
Dec. 31, 2020
Minimum | Forecast    
Subsequent Event [Line Items]    
Non-cash loss on sale of business   $ (6.0)
Maximum | Forecast    
Subsequent Event [Line Items]    
Non-cash loss on sale of business   $ 7.5
Subsequent Event    
Subsequent Event [Line Items]    
Proceeds from sale of business $ 21.0