SIGNIFICANT ACCOUNTING POLICIES (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
SIGNIFICANT ACCOUNTING POLICIES
Prepaid Advertising	$ 20	$ 8
Advertising expenses	$ 652	435	$ 277
Tax benefit recognition, measurement percentage	50.00%
Minimum period to classify uncertain tax position liabilities as long term liabilities (years)	1 year
Threshold percentage for amortization of net actuarial gains and losses	10.00%
Other Noncurrent Liabilities
SIGNIFICANT ACCOUNTING POLICIES
Prior period reclassification adjustment		$ 26