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Debt (Schedule Of Debt) (Detail) - USD ($) $ in Millions | Jun. 29, 2018 | Dec. 29, 2017 | Nov. 24, 2014
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Unamortized discount and issuance costs | $ (14.7) | $ (4.3) |  |
Total debt | 1,286.6 | 913.9 |  |
Less: Short-term debt | 0.4 | 128.4 | [1] |
Long-term debt | 1,286.2 | 785.5 | [1] |
Uncommitted Facilities, floating rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | 0.0 | 128.0 |  |
Promissory Notes And Other Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Promissory Notes and Other Debt, Current and Noncurrent | $ 1.3 | 1.2 |  |
2023 Senior Notes, 4.15%, due June 2023 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 4.15% |  |  |
Debt Instrument, Principal | $ 300.0 | 0.0 |  |
Total debt | $ 300.0 | 0.0 |  |
2028 Senior Notes, 4.9%, due June 2028 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 4.90% |  |  |
Debt Instrument, Principal | $ 600.0 | 0.0 |  |
Total debt | 600.0 | 0.0 |  |
2024 Senior Notes, 4.75%, due December 2024 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |  |  |  | 4.75%
Debt Instrument, Principal | 400.0 | 400.0 |  | $ 400.0
Total debt | 400.0 | 400.0 |  |
2014 Credit Facility, floating rate, retired | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | 0.0 | 389.0 |  |
Revolving Credit Facility, due May 2023 | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | 0.0 | 0.0 |  |
Term Loan [Member] | Term Loan, due May 2021 | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 0.0 | $ 0.0 |  |
[1] | See Note 2 for a summary of adjustments

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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