Other Operating Credits and Charges, Net (Details) - USD ($) $ in Millions	3 Months Ended					9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Reorganization charges	$ (2.0)	$ 1.0	$ 2.0	$ (1.0)	$ (4.0)	$ (5.0)	$ (5.0)
Severance costs related to curtailment	(2.0)	1.0		0.0		(3.0)	0.0
Adjustment to product related warranty reserves	0.0	(4.0)		8.0		4.0	8.0
Refund of environmental costs	0.0			0.0	$ 8.0	0.0	8.0
Insurance recoveries	0.0			0.0		1.0	0.0
Expenses related to hurricane	0.0	$ (1.0)		(1.0)		0.0	(1.0)
Other Operating Charges And Credits, Net	$ (3.0)			$ 6.0		$ (2.0)	$ 11.0