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Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 29, 2019 | Mar. 30, 2018
Segment Reporting Information [Line Items] |  |
Revenue | $ 801.6 | $ 742.2
Acquired deferred revenue adjustment | 2.9 | 2.9
Amortization of acquired capitalized commissions | (1.7) | (0.5)
Consolidated segment operating income | 86.3 | 64.2
Depreciation expense | 10.2 | 8.5
Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Consolidated segment operating income | 173.0 | 162.9
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Revenues | 804.5 | 745.1
Consolidated segment operating income | 174.2 | 165.3
Depreciation expense | 5.9 | 4.9
Buildings and Infrastructure [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 292.0 | 224.7
Acquired deferred revenue adjustment | 2.7 | 2.5
Amortization of acquired capitalized commissions | (1.6) | (0.4)
Buildings and Infrastructure [Member] | Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Consolidated segment operating income | 61.4 | 43.5
Buildings and Infrastructure [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Revenues | 294.7 | 227.2
Consolidated segment operating income | 62.5 | 45.6
Depreciation expense | 2.1 | 1.4
Geospatial [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 161.2 | 174.5
Acquired deferred revenue adjustment | 0.0 | 0.0
Geospatial [Member] | Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Consolidated segment operating income | 29.4 | 37.3
Geospatial [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Revenues | 161.2 | 174.5
Consolidated segment operating income | 29.4 | 37.3
Depreciation expense | 1.6 | 1.4
Resources and Utilities [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 159.3 | 159.2
Acquired deferred revenue adjustment | 0.2 | 0.3
Amortization of acquired capitalized commissions | (0.1) | (0.1)
Resources and Utilities [Member] | Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Consolidated segment operating income | 51.0 | 51.7
Resources and Utilities [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Revenues | 159.5 | 159.5
Consolidated segment operating income | 51.1 | 51.9
Depreciation expense | 1.1 | 1.0
Transportation [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 189.1 | 183.8
Acquired deferred revenue adjustment | 0.0 | 0.1
Amortization of acquired capitalized commissions |  | 0.0
Transportation [Member] | Segment Reconciling Items [Member] |  |
Segment Reporting Information [Line Items] |  |
Consolidated segment operating income | 31.2 | 30.4
Transportation [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment Revenues | 189.1 | 183.9
Consolidated segment operating income | 31.2 | 30.5
Depreciation expense | $ 1.1 | $ 1.1

X
- Definition The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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