Segment Information Geographical Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,151.6	$ 1,078.8	$ 1,150.2	$ 1,028.1	$ 1,289.8	$ 1,119.0	$ 1,105.6	$ 1,064.2	$ 4,408.7	$ 4,578.6	$ 4,609.3
Property, plant and equipment, net	231.5				304.1				231.5	304.1
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,024.7	1,047.7	1,049.5
Property, plant and equipment, net	62.4				77.8				62.4	77.8
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									654.6	556.7	556.3
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,679.3	1,604.4	1,605.8
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									872.5	876.2	843.0
Property, plant and equipment, net	150.1				168.2				150.1	168.2
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,400.4	1,583.8	1,537.1
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									2,272.9	2,460.0	2,380.1
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									456.5	514.2	$ 623.4
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 19.0				$ 58.1				$ 19.0	$ 58.1