ACQUISITIONS AND DISPOSITIONS - Starwood Consideration Transferred (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | |||
---|---|---|---|---|
Sep. 23, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Business Acquisition [Line Items] | ||||
Cash consideration to Starwood shareholders, net of cash acquired of $1,116 | $ 0 | $ 2,412 | $ 137 | |
Starwood Hotels & Resorts | ||||
Business Acquisition [Line Items] | ||||
Equivalent shares of Marriott common stock issued in exchange for Starwood outstanding shares (in shares) | 134.4 | |||
Marriott common stock price as of Merger Date (in USD per share) | $ 68.44 | |||
Fair value of Marriott common stock issued in exchange for Starwood outstanding shares | $ 9,198 | |||
Cash consideration to Starwood shareholders, net of cash acquired of $1,116 | 2,412 | |||
Fair value of Marriott equity-based awards issued in exchange for vested Starwood equity-based awards | 71 | |||
Total consideration transferred, net of cash acquired | 11,681 | |||
Cash acquired | $ 1,116 |