Condensed Consolidated Statements of Shareowners' Deficit Statement - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ (188.7)	$ (102.3)	$ (140.0)	$ (75.0)
Net loss	(7.8)	(5.5)	(41.8)	(32.4)
Other comprehensive loss	(6.8)	(3.5)	(19.5)	(2.3)
Shares purchased under employee plans and other			(1.1)	(0.8)
Stock-based compensation	1.3	1.6	3.0	3.4
Dividends on preferred stock	(2.6)	(2.6)	(5.2)	(5.2)
Ending Balance, Shareowners' Equity (Deficit)	(204.6)	(112.3)	(204.6)	(112.3)
Cumulative Convertible Preferred Shares [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 129.4	$ 129.4	$ 129.4	$ 129.4
Beginning Balance, Shares	3.1	3.1	3.1	3.1
Ending Balance, Shareowners' Equity (Deficit)	$ 129.4	$ 129.4	$ 129.4	$ 129.4
Ending Balance, Shares	3.1	3.1	3.1	3.1
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 0.5	$ 0.5	$ 0.5	$ 0.5
Beginning Balance, Shares	50.6	50.4	50.4	50.2
Shares issued under employee plans	0.1		0.3	0.2
Ending Balance, Shareowners' Equity (Deficit)	$ 0.5	$ 0.5	$ 0.5	$ 0.5
Ending Balance, Shares	50.7	50.4	50.7	50.4
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	$ 2,674.2	$ 2,678.4	$ 2,676.2	$ 2,680.0
Shares purchased under employee plans and other			(1.1)	(0.8)
Stock-based compensation	1.3	1.6	3.0	3.4
Dividends on preferred stock	(2.6)	(2.6)	(5.2)	(5.2)
Ending Balance, Shareowners' Equity (Deficit)	2,672.9	2,677.4	2,672.9	2,677.4
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	(2,810.0)	(2,736.3)	(2,776.0)	(2,709.4)
Net loss	(7.8)	(5.5)	(41.8)	(32.4)
Ending Balance, Shareowners' Equity (Deficit)	(2,817.8)	(2,741.8)	(2,817.8)	(2,741.8)
AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance, Shareowners' Equity (Deficit)	(182.8)	(174.3)	(170.1)	(175.5)
Other comprehensive loss	(6.8)	(3.5)	(19.5)	(2.3)
Ending Balance, Shareowners' Equity (Deficit)	$ (189.6)	$ (177.8)	$ (189.6)	$ (177.8)