Segment Information (Total Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 3,086.3	$ 3,010.0	$ 3,697.9
Operating Segments
Segment Reporting Information [Line Items]
Total assets	2,665.6	2,651.5	3,078.1
Operating Segments | Europe, Middle East & Africa
Segment Reporting Information [Line Items]
Total assets	1,079.5	1,048.8	1,190.5
Operating Segments | South Latin America
Segment Reporting Information [Line Items]
Total assets	1,057.8	1,001.0	1,273.6
Operating Segments | North Latin America
Segment Reporting Information [Line Items]
Total assets	316.1	329.7	335.8
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Total assets	212.2	272.0	278.2
Other operating segments and business activities(3)
Segment Reporting Information [Line Items]
Total assets	1.8	5.4	18.9
Global
Segment Reporting Information [Line Items]
Total assets	$ 418.9	$ 353.1	$ 600.9