Segment Information Geographical Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 387.0				$ 175.3				$ 387.0	$ 175.3	$ 165.7
Net sales	1,243.4	$ 983.3	$ 580.0	$ 509.6	610.4	$ 589.6	$ 644.5	$ 574.8	3,316.3	2,419.3	2,734.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	111.2				130.4				111.2	130.4	116.5
Net sales									1,020.1	1,014.3	1,035.9
GERMANY
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	199.7				0.0				199.7	0.0	0.0
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	18.4				12.9				18.4	12.9	17.2
Net sales									263.0	211.5	482.5
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									175.2	279.0	314.2
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 57.7				$ 32.0				57.7	32.0	32.0
Net sales									$ 1,858.0	$ 914.5	$ 902.2