Condensed Consolidated Statements of Shareowners' Equity (Deficit) - USD ($) shares in Millions, $ in Millions	Total	Cumulative Convertible Preferred Shares [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, Shareowners' Equity (Deficit) at Dec. 31, 2020	$ (191.1)	$ 129.4	$ 0.5	$ 2,670.3	$ (2,831.6)	$ (159.7)
Beginning Balance, Shares at Dec. 31, 2020		3.1
Beginning Balance, Shares at Dec. 31, 2020			50.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7.6)				(7.6)
Other comprehensive income (loss)	20.5					20.5
Shares issued under employee plans			0.2
Shares purchased under employee plans and other	(2.0)			(2.0)
Stock-based compensation	2.2			2.2
Dividends on preferred stock	(5.2)			(5.2)
Ending Balance, Shareowners' Equity (Deficit) at Jun. 30, 2021	(183.2)	$ 129.4	$ 0.5	2,665.3	(2,839.2)	(139.2)
Ending Balance, Shares at Jun. 30, 2021		3.1
Ending Balance, Shares at Jun. 30, 2021			50.9
Beginning Balance, Shareowners' Equity (Deficit) at Mar. 31, 2021	(189.6)	$ 129.4	$ 0.5	2,667.0	(2,834.6)	(151.9)
Beginning Balance, Shares at Mar. 31, 2021		3.1
Beginning Balance, Shares at Mar. 31, 2021			50.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4.6)				(4.6)
Other comprehensive income (loss)	12.7					12.7
Stock-based compensation	0.9			0.9
Dividends on preferred stock	(2.6)			(2.6)
Ending Balance, Shareowners' Equity (Deficit) at Jun. 30, 2021	(183.2)	$ 129.4	$ 0.5	2,665.3	(2,839.2)	(139.2)
Ending Balance, Shares at Jun. 30, 2021		3.1
Ending Balance, Shares at Jun. 30, 2021			50.9
Beginning Balance, Shareowners' Equity (Deficit) at Dec. 31, 2021	1,690.1	$ 0.0	$ 0.0	1,716.1	(27.2)	1.2
Beginning Balance, Shares at Dec. 31, 2021		0.0
Beginning Balance, Shares at Dec. 31, 2021			0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(68.0)				(68.0)
Other comprehensive income (loss)	(2.6)					(2.6)
Ending Balance, Shareowners' Equity (Deficit) at Jun. 30, 2022	1,619.5	$ 0.0	$ 0.0	1,716.1	(95.2)	(1.4)
Ending Balance, Shares at Jun. 30, 2022		0.0
Ending Balance, Shares at Jun. 30, 2022			0.0
Beginning Balance, Shareowners' Equity (Deficit) at Mar. 31, 2022	1,669.9	$ 0.0	$ 0.0	1,716.1	(49.2)	3.0
Beginning Balance, Shares at Mar. 31, 2022		0.0
Beginning Balance, Shares at Mar. 31, 2022			0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(46.0)				(46.0)
Other comprehensive income (loss)	(4.4)					(4.4)
Ending Balance, Shareowners' Equity (Deficit) at Jun. 30, 2022	$ 1,619.5	$ 0.0	$ 0.0	$ 1,716.1	$ (95.2)	$ (1.4)
Ending Balance, Shares at Jun. 30, 2022		0.0
Ending Balance, Shares at Jun. 30, 2022			0.0