Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax expense (benefit), rate	(4.10%)	(13.60%)	(1.90%)	(9.80%)
Tax receivable for anticipated carryback	$ 8.9		$ 8.9
CARES Act, tax benefit	3.2
Uncertain tax positions	5.7		$ 5.7
Proceeds from net operating loss carrybacks	$ 2.5