Goodwill and Other Intangible Assets (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	$ 224.4
Goodwill, Other	2.1
Goodwill, Ending Balance	226.5
Process Industries [Member]
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	50.0
Goodwill, Other	1.3
Goodwill, Ending Balance	51.3
Aerospace and Defense [Member]
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	162.3
Goodwill, Other	0.3
Goodwill, Ending Balance	162.6
Steel [Member]
Change in the carrying amount of Goodwill
Goodwill, Beginning Balance	12.1
Goodwill, Other	0.5
Goodwill, Ending Balance	$ 12.6