Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance, value at Dec. 31, 2021		$ 1,073.0	$ (1,036.0)	$ (24.9)	$ 12.1
Balance, shares at Dec. 31, 2021	28,097			2,927
Net loss			(1.5)		(1.5)
Balance, value at Jun. 30, 2022		1,073.0	(1,037.5)	$ (24.9)	10.6
Balance, shares at Jun. 30, 2022	28,097			2,927
Balance, value at Dec. 31, 2022		1,073.0	(1,039.0)	$ (24.9)	9.1
Balance, shares at Dec. 31, 2022	28,097			2,927
Net loss			(2.2)		(2.2)
Balance, value at Jun. 30, 2023		$ 1,073.0	$ (1,041.2)	$ (24.9)	$ 6.9
Balance, shares at Jun. 30, 2023	28,097			2,927