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DELL APPRAISAL RIGHTS MATTER. (Details) - Dell appraisal rights matter [Member] - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 30, 2016 | Dec. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2016
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Nonrecurring charge (reversal) related to Dell appraisal rights matter |  | $ (15.2) |  | $ 166.2
Insurance proceeds | $ 100.0 |  | $ 50.0 |

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- Definition Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233 + Details
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- Definition Amount, before deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233 + Details
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