Income Taxes Income Taxes - Deferred Taxes By Balance Sheet Account (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Deferred income taxes - assets	$ 120.8	$ 243.9
Deferred income taxes - liabilities	(134.5)	(153.5)
Net deferred tax assets classified as held-for-sale	13.1	0.0
Net deferred tax (liability)	$ (0.6)
Net deferred tax asset		$ 90.4