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Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 29, 2017 | Sep. 29, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 30, 2016 | Sep. 30, 2016 | Jul. 01, 2016 | Apr. 01, 2016 | Dec. 28, 2018 | Dec. 29, 2017 | Dec. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 785.5 |  | $ 795.2 | $ 785.5 | $ 742.2 | $ 699.8 | $ 676.2 | $ 659.9 | $ 610.6 | $ 3,108.4 | $ 2,646.5 | [1] | $ 2,362.1 | [1]
Acquired deferred revenue adjustment |  |  |  |  |  |  |  |  |  | 23.6 | 2.8 |  | 2.6 |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 320.7 | 235.7 | [1] | 180.4 | [1]
Amortization of Deferred Sales Commissions |  |  |  |  |  |  |  |  |  | (4.7) | (1.3) |  | (1.6) |
Depreciation |  |  |  |  |  |  |  |  |  | 35.6 | 34.6 | [1] | 37.0 | [1]
Accounts receivable | 427.7 | [2] |  |  |  | 366.2 |  |  |  | 512.6 | 427.7 | [2] | 366.2 |
Inventories | 264.6 | [2] |  |  |  | 213.3 |  |  |  | 298.0 | 264.6 | [2] | 213.3 |
Goodwill | 2,287.1 | [2] |  |  |  | 2,077.6 |  |  |  | 3,540.0 | 2,287.1 | [2] | 2,077.6 |
Building and Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 1,065.5 | 829.4 |  | 741.8 |
Acquired deferred revenue adjustment |  |  |  |  |  |  |  |  |  | 22.2 | 1.1 |  | 1.0 |
Amortization of Deferred Sales Commissions |  |  |  |  |  |  |  |  |  | (4.5) | (0.9) |  | (1.0) |
Accounts receivable | 120.1 |  |  |  |  | 104.6 |  |  |  | 177.5 | 120.1 |  | 104.6 |
Inventories | 62.1 |  |  |  |  | 51.3 |  |  |  | 70.3 | 62.1 |  | 51.3 |
Goodwill | 706.8 |  |  |  |  | 663.7 |  |  |  | 1,970.2 | 706.8 |  | 663.7 |
Geospatial [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 723.1 | 658.5 |  | 635.7 |
Acquired deferred revenue adjustment |  |  |  |  |  |  |  |  |  | 0.0 | 0.0 |  | 0.0 |
Accounts receivable | 121.5 |  |  |  |  | 109.7 |  |  |  | 118.7 | 121.5 |  | 109.7 |
Inventories | 110.3 |  |  |  |  | 99.2 |  |  |  | 133.5 | 110.3 |  | 99.2 |
Goodwill | 415.3 |  |  |  |  | 405.1 |  |  |  | 403.1 | 415.3 |  | 405.1 |
Resources and Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 567.1 | 481.0 |  | 397.4 |
Acquired deferred revenue adjustment |  |  |  |  |  |  |  |  |  | 1.0 | 1.0 |  | 0.8 |
Amortization of Deferred Sales Commissions |  |  |  |  |  |  |  |  |  | (0.2) | (0.1) |  | (0.3) |
Accounts receivable | 78.5 |  |  |  |  | 65.6 |  |  |  | 83.8 | 78.5 |  | 65.6 |
Inventories | 46.0 |  |  |  |  | 30.4 |  |  |  | 46.2 | 46.0 |  | 30.4 |
Goodwill | 314.5 |  |  |  |  | 217.7 |  |  |  | 305.7 | 314.5 |  | 217.7 |
Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 752.7 | 677.6 |  | 587.2 |
Acquired deferred revenue adjustment |  |  |  |  |  |  |  |  |  | 0.4 | 0.7 |  | 0.8 |
Amortization of Deferred Sales Commissions |  |  |  |  |  |  |  |  |  |  | (0.3) |  | (0.3) |
Accounts receivable | 107.6 |  |  |  |  | 86.3 |  |  |  | 132.6 | 107.6 |  | 86.3 |
Inventories | 46.2 |  |  |  |  | 32.4 |  |  |  | 48.0 | 46.2 |  | 32.4 |
Goodwill | $ 850.5 |  |  |  |  | $ 791.1 |  |  |  | 861.0 | 850.5 |  | 791.1 |
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 3,132.0 | 2,649.3 | [3] | 2,364.7 | [3]
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 734.6 | 558.3 |  | 476.4 |
Depreciation |  |  |  |  |  |  |  |  |  | 21.1 | 20.0 |  | 21.0 |
Operating Segments [Member] | Building and Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 1,087.7 | 830.5 | [3] | 742.8 | [3]
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 256.7 | 176.2 |  | 132.7 |
Depreciation |  |  |  |  |  |  |  |  |  | 6.4 | 6.2 |  | 7.0 |
Operating Segments [Member] | Geospatial [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 723.1 | 658.5 | [3] | 635.7 | [3]
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 166.4 | 129.4 |  | 120.6 |
Depreciation |  |  |  |  |  |  |  |  |  | 6.0 | 5.4 |  | 6.5 |
Operating Segments [Member] | Resources and Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 568.1 | 482.0 | [3] | 398.2 | [3]
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 168.2 | 137.9 |  | 119.3 |
Depreciation |  |  |  |  |  |  |  |  |  | 4.2 | 3.2 |  | 2.0 |
Operating Segments [Member] | Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 753.1 | 678.3 | [3] | 588.0 | [3]
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 143.3 | 114.8 |  | 103.8 |
Depreciation |  |  |  |  |  |  |  |  |  | 4.5 | 5.2 |  | 5.5 |
Segment Reconciling Items [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 715.7 | 556.8 |  | 475.4 |
Segment Reconciling Items [Member] | Building and Infrastructure [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 239.0 | 176.0 |  | 132.7 |
Segment Reconciling Items [Member] | Geospatial [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 166.4 | 129.4 |  | 120.6 |
Segment Reconciling Items [Member] | Resources and Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | 167.4 | 137.0 |  | 118.8 |
Segment Reconciling Items [Member] | Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  | $ 142.9 | $ 114.4 |  | $ 103.3 |
[1] | See Note 2 for a summary of adjustments
[2] | See Note 2 for a summary of adjustments
[3] | Adjusted to reflect adoption of the new revenue recognition standard, Revenue from Contracts with Customers. For further information, see Note 2.

X
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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