Inventories (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Inventories [Abstract]
Raw materials	$ 249.3	$ 427.3
Work-in-process	935.8	767.8
Finished goods, including parts and subassemblies	1,797.1	1,376.9
Other	13.1	12.5
Gross Inventories	2,995.3	2,584.5
Excess of current standard costs over LIFO costs	(113.4)	(102.7)
Allowances	(84.9)	(81.9)
Total inventories	$ 2,797.0	$ 2,399.9