Discontinued Operations - Consolidation of Captions within Statements of Operation for Loss from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings (loss) from discontinued operations attributable to blow molding business
Earnings (loss) from discontinued operations	$ 21.8	$ 1.1	$ 10.9	$ (0.5)
Blow Molding Business | Discontinued Operations, Held-for-sale
Earnings (loss) from discontinued operations attributable to blow molding business
Net sales	0.6	25.5	42.7	71.6
Cost of sales	1.5	20.2	36.6	57.1
Selling, general and administrative expenses	0.2	3.8	6.7	11.7
Amortization expense	0.1	0.4	1.0	1.3
Loss (gain) on currency translation	0.7	(0.6)	0.1	(0.2)
Other expense	0.3	0.3	11.2	1.0
Operating (loss) earnings from discontinued operations	(2.2)	1.4	(12.9)	0.7
Gain on disposal of discontinued operations	24.8	0.0	24.8	0.0
Earnings from discontinued operations before income taxes	22.6	1.4	11.9	0.7
Income tax expense	0.8	0.3	1.0	1.2
Earnings (loss) from discontinued operations	$ 21.8	$ 1.1	$ 10.9	$ (0.5)