SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Search & Applications | Minimum
Deferred revenue
Revenue recognition period	1 year
Search & Applications | Maximum
Deferred revenue
Revenue recognition period	2 years
Dating businesses
Deferred revenue
Deferred revenue	117.9	$ 116.5
Dating businesses | Minimum
Deferred revenue
Revenue recognition period	1 month
Dating businesses | Maximum
Deferred revenue
Revenue recognition period	6 months
DailyBurn | Minimum
Deferred revenue
Revenue recognition period	1 month
DailyBurn | Maximum
Deferred revenue
Revenue recognition period	12 months
Media | Minimum
Deferred revenue
Revenue recognition period	1 month
Media | Maximum
Deferred revenue
Revenue recognition period	1 year
HomeAdvisor | Minimum
Deferred revenue
Revenue recognition period	1 month
HomeAdvisor | Maximum
Deferred revenue
Revenue recognition period	1 year