Acquisitions And Other Investments (Schedule Of Business Acquisitions, Consideration Paid And Purchase Price Allocation) (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2011 Fabcor [Member]	May 31, 2011 EC Source [Member]	May 02, 2011 EC Source [Member]	Nov. 30, 2009 Precision [Member]	Nov. 30, 2009 Customer Contracts [Member] Precision [Member]	Apr. 30, 2011 Customer Relationships [Member] Fabcor [Member]	Apr. 30, 2011 Noncompete Agreements [Member] Fabcor [Member]	May 31, 2011 Noncompete Agreements [Member] EC Source [Member]	Nov. 30, 2009 Noncompete Agreements [Member] Precision [Member]	Apr. 30, 2011 Order or Production Backlog [Member] Fabcor [Member]	May 31, 2011 Order or Production Backlog [Member] EC Source [Member]	Apr. 30, 2011 Trade Names [Member] Fabcor [Member]	May 31, 2011 Pre-Qualifications [Member] EC Source [Member]
Purchase Price Consideration:
Shares transferred		$ 94.2
Cash	22.8	0.3		126.4
Debt assumed	7.0	8.6		33.6
Fair value of contingent consideration (earn-out liability)	16.9	25.0		54.2
Total liabilities incurred	23.9	33.6		87.8
Total consideration	46.7	128.1		214.2
Fair value of equity investment		39.6	39.6
Amount of total consideration		167.7
Liabilities included in preliminary purchase price allocation	(23.9)	(33.6)		(87.8)
Preliminary Purchase Price Allocation:
Current assets	24.3	21.0		94.7
Intangible finite asset acquired					14.5	3.1	0.1	1.5	1.8	0.4	11.0	0.7
Intangible indefinite-lived asset acquired													31.3
Goodwill	26.7	120.7		139.0
Property and equipment	12.8	10.1		56.3
Total assets acquired	68.1	195.6		306.3
Current liabilities	(24.1)	(13.4)		(92.1)
Deferred income taxes		(14.5)
Deferred income taxes and other liabilities	(4.3)
Liability arising from contingent consideration arrangement	(16.9)	(25.0)		(54.2)
Long-term debt	(7.0)	(8.6)		(33.6)
Total liabilities assumed	(45.3)	(61.5)		(179.9)
Net assets acquired	$ 22.8	$ 134.1		$ 126.4