STOCK-BASED COMPENSATION - Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan - shares shares in Millions		12 Months Ended
Jan. 01, 2015	Dec. 31, 2019
Employee awards
Percentage of share purchase price of common stock under ESPP	85.00%
Aggregate number of common stock shares authorized for issuance		1.5
Common stock issued under employee stock purchase plan as of December 31, 2018 (in shares)		1.0
Number of shares available for future issuance		0.5
Common stock issued under employee stock purchase plan (in shares)		0.2

Number of share instruments newly issued under a share-based compensation plan as of reporting date.

No definition available.

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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

Number of shares authorized for issuance under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Number of shares issued under share-based payment arrangement.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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