Operating Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015 segment	Mar. 31, 2014
Financial information of reportable segments
Number of operating segments aggregated for classification as reportable segments	8
Number of operating units	10us-gaap_NumberOfOperatingSegments
Number of reportable segments	3us-gaap_NumberOfReportableSegments
Net sales	$ 3,297.6us-gaap_SalesRevenueNet	$ 3,336.6us-gaap_SalesRevenueNet
Operating Income (Loss)	387.7us-gaap_OperatingIncomeLoss	350.9us-gaap_OperatingIncomeLoss
Other
Financial information of reportable segments
Number of operating units	2
Operating segment
Financial information of reportable segments
Net sales	3,307.7	3,176.1
Operating Income (Loss)	388.6	334.9
Operating segment \| Global Industrial
Financial information of reportable segments
Net sales	1,129.7	1,077.2
Operating Income (Loss)	119.2	113.6
Operating segment \| Global Institutional
Financial information of reportable segments
Net sales	1,018.0	956.7
Operating Income (Loss)	169.5	152.0
Operating segment \| Global Energy
Financial information of reportable segments
Net sales	981.9	973.7
Operating Income (Loss)	128.7	127.6
Operating segment \| Other
Financial information of reportable segments
Net sales	178.1	168.5
Operating Income (Loss)	23.4	21.4
Currency impact
Financial information of reportable segments
Net sales	(10.1)	160.5
Operating Income (Loss)	(0.9)	16.0
Corporate
Financial information of reportable segments
Operating Income (Loss)	(52.2)	(79.7)
Intersegment
Financial information of reportable segments
Net sales	$ 0	$ 0

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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