Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax credit carryforwards	$ 4.1	$ 20.3
Net operating loss carryforwards	72.9	134.2
Accrued liabilities and other reserves		0.1
Intangible assets and investments	0.4
Capital losses	35.5	33.1
Other, net	44.3	44.2
Total deferred tax assets	157.2	231.9
Valuation allowance	(157.2)	(231.9)
Net deferred tax assets
Unremitted earnings of foreign subsidiaries	(0.2)	(0.2)
Total deferred tax liabilities	(0.2)	(0.2)
Valuation allowance
Total deferred tax liabilities	(0.2)	(0.2)
Net deferred tax liabilities	$ (0.2)	$ (0.2)