Inventories (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Inventories [Abstract]
Raw materials	$ 231.4	$ 237.9
Work-in-process	988.0	902.1
Finished goods, including parts and subassemblies	1,900.9	1,797.9
Other	16.8	14.3
Gross Inventories	3,137.1	2,952.2
Excess of current standard costs over LIFO costs	(123.4)	(122.0)
Allowance for obsolete and excess inventory	(90.8)	(89.0)
Total inventories	$ 2,922.9	$ 2,741.2