Supplemental Financial Statement Information - Schedule of Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income and Expenses [Abstract]
Rent and royalty income	$ 0.7	$ 0.9	$ 1.4	$ 1.7
Gains from disposal of property, plant and equipment, net	29.1	0.4	28.3	0.4
Net equity (loss) gain on joint ventures (See Note 6)	(3.5)	2.3	(6.3)	2.4
Loss from sale of businesses (See Note 5)	(7.7)	0.0	(7.7)	0.0
Gain on joint venture deconsolidation (See Note 6)	0.0	0.0	0.0	15.9
Other	0.0	0.2	0.0	1.2
Total other income, net	$ 18.6	$ 3.8	$ 15.7	$ 21.6