Condensed Consolidated Statements of Shareowners' Deficit - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ (191.1)	$ (140.0)
Beginning Balance, Shares	3,105,000
Net loss	$ (3.0)	(34.0)
Other comprehensive income (loss)	7.8	(12.7)
Shares issued under employee plans	0.0	0.0
Shares purchased under employee plans and other	(2.0)	(1.1)
Stock-based compensation	1.3	1.7
Dividends on preferred stock	(2.6)	(2.6)
Ending Balance, Shareowners' Equity (Deficit)	$ (189.6)	(188.7)
Ending Balance, Shares	3,105,000
Cumulative Convertible Preferred Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 129.4	$ 129.4
Beginning Balance, Shares	3,100,000	3,100,000
Ending Balance, Shareowners' Equity (Deficit)	$ 129.4	$ 129.4
Ending Balance, Shares	3,100,000	3,100,000
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 0.5	$ 0.5
Beginning Balance, Shares	50,700,000	50,400,000
Shares issued under employee plans	$ 0.0	$ 0.0
Shares issued under employee plans	200,000	200,000
Ending Balance, Shareowners' Equity (Deficit)	$ 0.5	$ 0.5
Ending Balance, Shares	50,900,000	50,600,000
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 2,670.3	$ 2,676.2
Shares issued under employee plans	0.0	0.0
Shares purchased under employee plans and other	(2.0)	(1.1)
Stock-based compensation	1.3	1.7
Dividends on preferred stock	(2.6)	(2.6)
Ending Balance, Shareowners' Equity (Deficit)	2,667.0	2,674.2
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	(2,831.6)	(2,776.0)
Net loss	(3.0)	(34.0)
Ending Balance, Shareowners' Equity (Deficit)	(2,834.6)	(2,810.0)
Accumulated Other Comprehensive Loss [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	(159.7)	(170.1)
Other comprehensive income (loss)	7.8	(12.7)
Ending Balance, Shareowners' Equity (Deficit)	$ (151.9)	$ (182.8)