ACQUISITIONS AND DISPOSITIONS - Consideration Transferred (Details) - ILG - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Sep. 30, 2019	Aug. 31, 2018	Sep. 01, 2018
Business Acquisition [Line Items]
Equivalent shares of Marriott Vacations Worldwide common stock issued in exchange for ILG outstanding shares (in shares)	20.5
Marriott Vacations Worldwide common stock price as of acquisition date (in usd per share)	$ 119.00
Fair value of Marriott Vacations Worldwide common stock issued in exchange for ILG outstanding shares	$ 2,441
Cash consideration to ILG shareholders, net of cash acquired of $154 million	1,680
Fair value of ILG equity-based awards attributed to pre-combination service	64
Total consideration transferred, net of cash acquired	4,185
Noncontrolling interests	32
Total shareholder equity	$ 4,217		$ 4,217
Cash acquired from acquisition		$ 154

Number of shares of equity interests issued or issuable to acquire entity.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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