Plant and Equipment and Goodwill (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Plant and equipment [Abstract]
Plant and equipment, at cost	$ 2,468.1	$ 2,285.9
Accumulated depreciation	(1,128.6)	(1,038.1)
Total plant and equipment	1,339.5	1,247.8
Balance	1,475.8
Current year acquisitions	25.7
Translation	(4.8)
Balance	$ 1,496.7