Segment Information (Total Revenue) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 1,401.7	$ 1,424.2	$ 1,351.9	$ 1,393.5	$ 1,568.8	$ 1,417.8	$ 1,395.9	$ 1,333.1	$ 5,571.3	$ 5,715.6	$ 5,717.7
Operating Segments
Segment Reporting Information [Line Items]
Revenue									5,520.8	5,632.6	5,608.0
Operating Segments | Europe, Middle East & Africa
Segment Reporting Information [Line Items]
Revenue									2,093.8	2,126.5	2,138.2
Operating Segments | South Latin America
Segment Reporting Information [Line Items]
Revenue									2,146.9	2,222.4	2,145.9
Operating Segments | North Latin America
Segment Reporting Information [Line Items]
Revenue									809.3	811.8	829.9
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Revenue									470.8	471.9	494.0
Other operating segments and business activities
Segment Reporting Information [Line Items]
Revenue									$ 50.5	$ 83.0	$ 109.7