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Business Combinations (Changes In Carrying Amount Of Goodwill By Operating Segment) (Detail) $ in Millions | 3 Months Ended
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Mar. 30, 2018 USD ($)
Goodwill [Line Items] |  |
Balance as of fiscal year 2017 | $ 2,287.1 | [1]
Additions due to acquisitions | 415.6 |
Purchase price adjustments- prior years' acquisitions | (0.2) |
Foreign currency translation adjustments | 25.7 |
Divestiture (1) | (1.8) | [2]
Balance as of the end of the first quarter of fiscal 2018 | 2,726.4 |
Buildings and Infrastructure [Member] |  |
Goodwill [Line Items] |  |
Balance as of fiscal year 2017 | 706.8 |
Additions due to acquisitions | 415.6 |
Purchase price adjustments- prior years' acquisitions | 0.0 |
Foreign currency translation adjustments | 17.3 |
Divestiture (1) | 0.0 | [2]
Balance as of the end of the first quarter of fiscal 2018 | 1,139.7 |
Geospatial [Member] |  |
Goodwill [Line Items] |  |
Balance as of fiscal year 2017 | 415.3 |
Purchase price adjustments- prior years' acquisitions | 0.0 |
Foreign currency translation adjustments | 3.0 |
Divestiture (1) | (1.8) | [2]
Balance as of the end of the first quarter of fiscal 2018 | 416.5 |
Resources and Utilities [Member] |  |
Goodwill [Line Items] |  |
Balance as of fiscal year 2017 | 314.5 |
Purchase price adjustments- prior years' acquisitions | 0.0 |
Foreign currency translation adjustments | 3.9 |
Divestiture (1) | 0.0 | [2]
Balance as of the end of the first quarter of fiscal 2018 | 318.4 |
Transportation [Member] |  |
Goodwill [Line Items] |  |
Balance as of fiscal year 2017 | 850.5 |
Purchase price adjustments- prior years' acquisitions | (0.2) |
Foreign currency translation adjustments | 1.5 |
Divestiture (1) | 0.0 | [2]
Balance as of the end of the first quarter of fiscal 2018 | $ 851.8 |
[1] | See Note 2 for a summary of adjustments
[2] | In the first quarter of 2018, the Company sold its Geoline business, which was part of the Geospatial segment.

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