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STOCK-BASED COMPENSATION. (Future Stock-Based Compensation Expense) (Details) $ in Millions	Mar. 31, 2018 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Second quarter 2018	$ 46.3
Third quarter 2018	45.7
Fourth quarter 2018	40.1
2019	95.9
2020 through 2023	79.5
Total	$ 307.5

X

- Definition

Unrecognized cost of unvested share-based compensation awards to be recognized in the second fiscal year through vesting period.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards to be recognized in the next fiscal year.

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards to be recognized in quarter four of the fiscal year.

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested share-based compensation awards to be recognized in quarter three of the fiscal year.

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested share-based compensation awards to be recognized in quarter two of the fiscal year.

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No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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