Revenue Recognition - Disaggregation of Revenue by Major Geographical Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 64.9	$ 114.0	$ 133.4	$ 212.3
North America
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	14.7	18.6	29.5	34.4
Latin America
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0.0	0.3	0.1	1.0
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	11.2	17.6	22.5	32.9
Asia
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	39.0	77.5	81.3	144.0
JAPAN
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	26.6	43.8	57.7	91.8
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 14.5	18.1	$ 29.1	33.8
CHINA
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 24.9		$ 32.9