Acquisitions and Dispositions	3 Months Ended
Mar. 31, 2016
Acquisitions and Dispositions [Abstract]
Acquisitions and Dispositions	ACQUISITIONS AND DISPOSITIONS Planned Acquisition On November 15, 2015, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) to combine with Starwood Hotels & Resorts Worldwide, Inc. (“Starwood”). The Merger Agreement provides for the Company to combine with Starwood in a series of transactions after which Starwood will be an indirect wholly owned subsidiary of the Company (the “Starwood Combination”). On March 20, 2016, we entered into Amendment Number 1 (the “Amendment”) to the Merger Agreement. The Amendment modified the merger consideration payable to shareholders of Starwood. If the combination transactions are completed, shareholders of Starwood will receive 0.80 shares of our Class A Common Stock, par value $0.01 per share, and $21.00 in cash, without interest, for each share of Starwood common stock, par value $0.01 per share, that they own immediately before these transactions. On April 8, 2016, shareholders of both Marriott and Starwood approved the combination transactions, and in the 2016 first quarter, we cleared the antitrust and competition reviews in a number of jurisdictions, including the United States and Canada. We expect that the combination will close in mid-2016, after remaining customary conditions are satisfied, including receipt of additional antitrust approvals and the completion of Starwood’s previously announced spin-off of its vacation ownership business, or another spin-off, split-off, analogous disposition, or sale of its vacation ownership business. Planned Dispositions At the end of the 2016 first quarter, we held $78 million of assets classified as “Assets held for sale” and $3 million of liabilities associated with those assets, which we recorded under “Accrued expenses and other” on our Balance Sheet. In the 2016 second quarter, we sold one of these assets, a North American Limited-Service segment plot of land ($47 million in assets and $1 million in liabilities). We expect to sell the remaining Miami Beach EDITION residences ($31 million in assets and $2 million in liabilities) in 2016.

ACQUISITIONS AND DISPOSITIONS

Planned Acquisition

On November 15, 2015, we entered into an Agreement and Plan of Merger (the “Merger Agreement”) to combine with Starwood Hotels & Resorts Worldwide, Inc. (“Starwood”). The Merger Agreement provides for the Company to combine with Starwood in a series of transactions after which Starwood will be an indirect wholly owned subsidiary of the Company (the “Starwood Combination”). On March 20, 2016, we entered into Amendment Number 1 (the “Amendment”) to the Merger Agreement. The Amendment modified the merger consideration payable to shareholders of Starwood. If the combination transactions are completed, shareholders of Starwood will receive 0.80 shares of our Class A Common Stock, par value $0.01 per share, and $21.00 in cash, without interest, for each share of Starwood common stock, par value $0.01 per share, that they own immediately before these transactions. On April 8, 2016, shareholders of both Marriott and Starwood approved the combination transactions, and in the 2016 first quarter, we cleared the antitrust and competition reviews in a number of jurisdictions, including the United States and Canada. We expect that the combination will close in mid-2016, after remaining customary conditions are satisfied, including receipt of additional antitrust approvals and the completion of Starwood’s previously announced spin-off of its vacation ownership business, or another spin-off, split-off, analogous disposition, or sale of its vacation ownership business.

Planned Dispositions

At the end of the 2016 first quarter, we held $78 million of assets classified as “Assets held for sale” and $3 million of liabilities associated with those assets, which we recorded under “Accrued expenses and other” on our Balance Sheet. In the 2016 second quarter, we sold one of these assets, a North American Limited-Service segment plot of land ($47 million in assets and $1 million in liabilities). We expect to sell the remaining Miami Beach EDITION residences ($31 million in assets and $2 million in liabilities) in 2016.