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STOCK-BASED COMPENSATION. (Future Stock-Based Compensation Expense) (Details) $ in Millions	Mar. 31, 2021 USD ($)
Share-based Payment Arrangement [Abstract]
Second quarter 2021	$ 56.9
Third quarter 2021	56.7
Fourth quarter 2021	50.2
2022	117.4
2023 through 2026	97.2
Total	$ 378.4

X

- 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

Employee Service Share-Based Compensation, Nonvested Awards, Compensation Cost To Be Recognized Quarter Two Of Current Fiscal Year

+ References

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- 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.

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- Definition

Amount of cost not yet recognized for nonvested award 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 (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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