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Business Acquisitions	6 Months Ended
	Jun. 30, 2011
Notes to Financial Statements [Abstract]
Business Acquisitions	4.   Business Acquisitions On June 3, 2011, Roper acquired 100% of the shares of Northern Digital, Inc. ("NDI"), a leading provider of 3-D measurement technology for medical applications in computer-assisted surgery and computer-assisted therapy. Roper acquired NDI as an addition to its medical platform, and is reported in the Medical and Scientific Imaging segment.  The purchase price was $200 million Canadian dollars, which translated to $205 million U.S. dollars.  Roper recorded $135 million in goodwill and $74 million in other identifiable intangible assets in connection with the acquisition. The Company recorded $1.1 million in transaction costs related to the acquisition, which were expensed as incurred.  Supplemental pro forma data has not been supplied as the acquisition did not have a material impact on Roper's consolidated results of operations.

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- Definition

Description of a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. This element may be used as a single block of text to encapsulate the entire disclosure (including data and tables) regarding business combinations, including leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph F4
-Subparagraph e
-Appendix F

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