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Segment Information (Reconciliation Of Company's Consolidated Segment Operating Income To Consolidated Income Before Income Taxes) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 30, 2018 | Mar. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Consolidated operating income | $ 64.2 | $ 54.7 | [1],[2]
Unallocated corporate expense | (332.0) | (269.6) | [1]
Restructuring charges | (1.4) | (3.4) | [2]
Amortization of purchased intangible assets | (40.5) | (33.3) | [2],[3]
Stock-based compensation | (17.4) | (13.7) | [2],[3]
Amortization of acquisition-related inventory step-up | 0.0 | (0.1) | [2]
Acquisition and divestiture items | (16.0) | (2.1) | [2]
Non-operating income, net: | 2.5 | 9.0 | [1],[2]
Consolidated income before taxes | 66.7 | 63.7 | [1],[2]
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated operating income | 162.9 | 125.7 | [2],[4]
Corporate, Non-Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Unallocated corporate expense | $ (23.4) | $ (18.4) | [2]
[1] | See Note 2 for a summary of adjustments
[2] | See Note 2 for a summary of adjustments
[3] | See Note 2 for a summary of adjustments
[4] | See Note 2 for a summary of adjustments

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- Definition The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(3)(ii)(A)) -URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862 + Details
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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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