SHARE-BASED COMPENSATION - Schedule of Stock Options Activity (Details) - Stock options $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares
Options
Balance, beginning of year	14,712
Granted	0
Exercised	(5,975)
Forfeited or expired	(250)
Balance, end of year	8,487
Exercisable, end of year	5,374
Number of options outstanding that have met the requisite service period and will be released as identifed in the grant terms	727
Weighted Average Exercise Price
Balance, beginning of year | $ / shares	$ 24.96
Granted(1) | $ / shares	0.00
Exercised | $ / shares	22.71
Forfeited or expired | $ / shares	27.75
Balance, end of year | $ / shares	26.47
Exercisable, end of year | $ / shares	$ 26.45
Weighted Average Remaining Contractual Term
Balance, end of year	6 years 22 days
Exercisable, end of year	5 years 1 month 10 days
Aggregate Intrinsic Value
Balance, end of year | $	$ 75
Exercisable, end of year | $	$ 133