SHARE-BASED COMPENSATION - Schedule of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Options
Balance, beginning of year	12,285,000
Granted	2,123,000
Exercised	(1,376,000)
Forfeited or expired	(269,000)
Balance, end of year	12,763,000	12,285,000
Exercisable, end of year	8,442,000
Number of options outstanding that have met the requisite service period and will be released as identifed in the grant terms	1,034,000
Weighted Average Exercise Price
Balance, beginning of year	$ 24.19
Granted	35.40
Exercised	24.46
Forfeited or expired	31.34
Balance, end of year	25.88	$ 24.19
Exercisable, end of year	$ 22.78
Weighted Average Remaining Contractual Term
Balance, end of year	5 years 2 months 12 days
Exercisable, end of year	3 years 7 months 13 days
Aggregate Intrinsic Value
Balance, end of year	$ 65
Exercisable, end of year	$ 62
Real Estate Divestiture
Options
Forfeited or expired		(1,601,000)