Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Income before income taxes	$ (0.2)	$ 5.6
Income tax expense	5.7	$ 4.0
KWE [Member]
Income Tax Contingency [Line Items]
Foreign partnership investment basis difference	85.2		$ 77.1
Valuation allowance	$ 85.2		$ 72.6