Segment Information Geographical Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 364.5				$ 387.0				$ 364.5	$ 387.0
Net sales	1,249.9	$ 1,122.7	$ 1,133.9	$ 1,102.8	1,243.4	$ 983.3	$ 580.0	$ 509.6	4,609.3	3,316.3	$ 2,419.3
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	91.7				111.2				91.7	111.2	130.4
Net sales									1,038.6	1,020.1	1,014.3
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	205.3				199.7				205.3	199.7	0.0
Net sales									564.3	244.9	0.0
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,815.8	938.3	406.3
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									218.5	263.0	211.5
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									348.7	379.2	347.6
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									96.3	175.2	279.0
Other AP
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									527.1	295.6	160.6
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 67.5				$ 76.1				$ 67.5	$ 76.1	$ 44.9