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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

X

- 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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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

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