Segment Information (Total Revenue) (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
Total revenue	$ 1,568.8	$ 1,417.8	$ 1,395.9	$ 1,333.1	$ 1,568.1	$ 1,408.8	$ 1,434.3	$ 1,306.5	$ 5,715.6	$ 5,717.7	$ 6,160.5
Operating Segments [Member]
Total revenue									5,679.0	5,663.7	6,056.6
Operating Segments [Member] | EMEA Segment [Member]
Total revenue									2,126.5	2,138.2	2,229.2
Operating Segments [Member] | South Latin America Segment [Member]
Total revenue									2,222.4	2,145.9	2,309.6
Operating Segments [Member] | North Latin America Segment [Member]
Total revenue									811.8	829.9	901.0
Operating Segments [Member] | Asia Pacific Segment [Member]
Total revenue									518.3	549.7	616.8
Other operating segments and business activities [Member]
Total revenue									$ 36.6	$ 54.0	$ 103.9