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Business Segments, Property and Equipment Expenditures (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | $ 2.3 | $ 99.8 | $ 1.3
Property, Plant and Equipment, Additions | 153.7 | 316.0 | 149.1
Net capital expenditures | 151.4 | 216.2 | 147.8
Reportable Subsegments [Member] | Americas [Member] |  |  |
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | 62.6 | 141.6 | 55.5
Reportable Subsegments [Member] | EMEA [Member] |  |  |
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | 44.5 | 54.2 | 42.9
Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | 20.3 | 16.1 | 14.4
LaSalle [Member] |  |  |
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | 1.2 | 67.9 | 8.4
Corporate [Member] |  |  |
Property and equipment expenditures [Abstract] |  |  |
Total Capital Expenditures | $ 25.1 | $ 36.2 | $ 27.9

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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