EQUITY (Details) $ / shares in Units, $ in Millions				1 Months Ended					3 Months Ended		6 Months Ended
	Jun. 20, 2017 USD ($)	May 11, 2016 USD ($) shares	Nov. 04, 2013 USD ($)	Aug. 31, 2017 $ / shares	May 31, 2017 $ / shares	Mar. 31, 2017 USD ($)	Feb. 28, 2017 $ / shares	Jun. 30, 2009 shares	Jun. 30, 2017 USD ($) $ / shares shares	Jun. 30, 2016 $ / shares	Jun. 30, 2017 USD ($) item $ / shares shares	Jun. 30, 2016 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares shares	Nov. 30, 2016 USD ($)
Equity
Authorized shares of common stock									300,000,000		300,000,000		300,000,000
Par value of common stock (in dollars per share) | $ / shares									$ 0.01		$ 0.01		$ 0.01
Shares of common stock issued									133,952,744		133,952,744		133,545,864
Shares of common stock outstanding									124,900,000		124,900,000		124,700,000
Shares held as treasury stock									9,037,627		9,037,627		8,878,489
Authorized shares of preferred stock									25,000,000		25,000,000		25,000,000
Par value of preferred stock (in dollars per share) | $ / shares									$ 0.01		$ 0.01		$ 0.01
Preferred stock, issued shares									0		0		0
Preferred stock, outstanding shares									0		0		0
Minimum number of series to issue preferred stock | item											1
Dividends declared per common share (in dollars per share) | $ / shares					$ 0.15		$ 0.15		$ 0.15	$ 0.12	$ 0.30	$ 0.24
Cash dividend paid | $	$ 19.0					$ 19.0
Stockholder Rights Plan
Rights per common stock share declared as dividend								1
Minimum percentage of common stock to be acquired before rights become exercisable								15.00%
Percentage of discount on prevailing market price of common stock								50.00%
Equity and Share Repurchase Program
Common stock repurchased | $											$ 3.0	$ 56.0
Stockholders' Equity Attributable to Noncontrolling Interest | $									$ 29.0		$ 29.0		$ 26.0
November 2016 Repurchase Program
Equity and Share Repurchase Program
Amount authorized under share repurchase program | $														$ 50.0
Number of shares of common stock repurchased											159,000
Common stock repurchased | $											$ 3.0
Remaining availability for future repurchases of common stock | $									46.0		46.0		49.0
CLC
Equity and Share Repurchase Program
Premium upon exercise of share options to settle loan (as a percent)			20.00%
CLC | Convertible Secured Loan Facility
Equity and Share Repurchase Program
Convertible secured loan available, subject to certain conditions being met | $			$ 15.0
CLC | VRI Europe Limited
Equity and Share Repurchase Program
Equity of VRIE issued as consideration for acquisition (as a percent)			24.50%
Ownership interest ( as a percent)			75.50%
Stockholders' Equity Attributable to Noncontrolling Interest | $									$ 29.0		$ 29.0		$ 26.0
Period from acquisition during which parties have agreed not to transfer their interests			5 years
Vistana
Equity
Common stock issued (in shares)		72,400,000
Common stock value | $		$ 1,000.0
Subsequent Event
Equity
Dividends declared per common share (in dollars per share) | $ / shares				$ 0.15