Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Income related to FLA arrangements with Parent	$ 1.6	$ 2.7	$ 3.9	$ 7.8
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Income related to FLA arrangements with Parent	1.6	2.7	3.9	7.8
Related parties	33.1	33.9	93.5	91.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Income related to FLA arrangements with Parent	1.6	2.7	3.9	7.8
Disaggregation of Revenue [Line Items]
Income related to FLA arrangements with Parent	1.6	2.7	3.9	7.8
Deficiency revenue	$ 5.1	$ 2.4	$ 11.1	$ 2.4