Inventories (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Inventories (at FIFO, which approximates replacement value):
Raw materials	$ 154.7	$ 154.3
Work in process	140.6	122.8
Finished goods	652.0	574.3
Subtotal (at FIFO)	947.3	851.4
Reduction of certain inventories to LIFO basis	(56.3)	(53.3)
Total	891.0	798.1
Inventories (Textual) [Abstract]
U.S. inventories determined by LIFO method	$ 130	$ 121