Segment Information Geographical Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,105.9	$ 995.2	$ 890.5	$ 910.7	$ 1,151.6	$ 1,078.8	$ 1,150.2	$ 1,028.1	$ 3,902.3	$ 4,408.7	$ 4,578.6
Property, plant and equipment, net	177.5				231.5				177.5	231.5
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									974.7	1,024.7	1,047.7
Property, plant and equipment, net	25.5				62.4				25.5	62.4
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									502.9	654.6	556.7
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,477.6	1,679.3	1,604.4
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									764.3	872.5	876.2
Property, plant and equipment, net	118.8				129.3				118.8	129.3
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,282.0	1,400.4	1,583.8
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									2,046.3	2,272.9	2,460.0
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									378.4	456.5	$ 514.2
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	$ 33.2				$ 39.8				$ 33.2	$ 39.8