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Derivative Instruments - Derivative Instruments in Designated Cash Flow Hedging Relationships (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivative [Line Items]      
Amount of gain (loss) recognized in OCI on derivatives $ (6.9) $ (4.0) $ 1.0
Impact of reclassification adjustment to interest expense included in Net Income (Loss) (1.0) 0.1 $ 0.0
Cash Flow Hedging      
Derivative [Line Items]      
Net gains (losses) on derivative instruments expected to be reclassified from accumulated other comprehensive income in next 12 months 1.6    
Cash Flow Hedging | Designated as Hedging Instrument      
Derivative [Line Items]      
Amount of gain (loss) recognized in OCI on derivatives (6.9) (4.0)  
Impact of reclassification adjustment to interest expense included in Net Income (Loss) $ 1.0 $ (0.1)