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STOCK INCENTIVE PLANS - Components of Restricted Stock Units (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	2,781,415
Unrecognized compensation expense	$ 20
Intrinsic value	$ 33
Weighted average remaining life (in years)	2 years 2 months 4 days
Service-Based Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	1,863,588
Unrecognized compensation expense	$ 13
Intrinsic value	$ 22
Weighted average remaining life (in years)	2 years 2 months 8 days
Performance-Based Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares) | shares	917,827
Unrecognized compensation expense	$ 7
Intrinsic value	$ 11
Weighted average remaining life (in years)	2 years 2 months 1 day

X

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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