Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Sales to external customers and Long-lived assets, net
Sales to external customer	$ 4,410.1	$ 4,381.4	$ 4,370.5	$ 4,015.2	$ 3,793.3	$ 3,724.6	$ 3,599.2	$ 3,326.8	$ 17,177.2	$ 14,443.9	$ 12,902.6
Long-lived assets, net	1,708.0				1,497.3				1,708.0	1,497.3
U.S.
Sales to external customers and Long-lived assets, net
Sales to external customer									10,435.9	9,238.9	8,285.8
Long-lived assets, net	1,177.0				1,050.2				1,177.0	1,050.2
Non-U.S.
Sales to external customers and Long-lived assets, net
Sales to external customer									6,741.3	5,205.0	4,616.8
Long-lived assets, net	$ 531.0				$ 447.1				$ 531.0	$ 447.1