SHARE-BASED COMPENSATION (Details 3) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Time-Based RSUs
Time-Based RSUs, Performance-Based RSUs and Deferred Share Units
Stock-Based Awards at the beginning of the period (in shares)	900,000
Granted (in shares)	1,000,000
Vested (in shares)	(100,000)
Stock-Based Awards at the end of the period (in shares)	1,800,000	900,000
Weighted-average grant-date fair value
Stock-Based awards at the beginning of the period (in dollars per share)	$ 51.34
Granted (in dollars per share)	110.01
Vested (in dollars per share)	85.58
Stock-Based awards at the end of the period (in dollars per share)	$ 80.96	$ 51.34
Unrecognized compensation expense
Remaining unrecognized compensation expense related to non-vested awards	$ 100
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized	1 year 10 months 24 days
Total fair value	$ 7	$ 8	$ 15
Performance-Based Restricted Stock Units
Time-Based RSUs, Performance-Based RSUs and Deferred Share Units
Stock-Based Awards at the beginning of the period (in shares)	1,200,000.0
Granted (in shares)	800,000.0
Vested (in shares)	(300,000.0)
Forfeited (in shares)	(200,000.0)
Stock-Based Awards at the end of the period (in shares)	1,500,000.0	1,200,000.0
Weighted-average grant-date fair value
Stock-Based awards at the beginning of the period (in dollars per share)	$ 160.44
Granted (in dollars per share)	320.15
Vested (in dollars per share)	78.80
Forfeited (in dollars per share)	217.39
Stock-Based awards at the end of the period (in dollars per share)	$ 261.33	$ 160.44
Unrecognized compensation expense
Remaining unrecognized compensation expense related to non-vested awards	$ 252
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized	3 years 6 months
Maximum common shares issuable upon vesting	4,610,663
Method and assumptions on valuation of stock options
Expected Company share volatility, minimum (as a percent)	40.90%	38.70%	36.10%
Expected Company share volatility, maximum (as a percent)	60.30%	45.40%	44.40%
Risk-free interest rate, minimum (as a percent)	1.10%	0.80%	0.50%
Risk-free interest rate, maximum (as a percent)	2.10%	2.30%	1.30%
Performance-Based Restricted Stock Units | Minimum
Method and assumptions on valuation of stock options
Contractual term (years)	2 years 9 months 18 days	2 years 7 months 6 days	2 years 9 months 18 days
Performance-Based Restricted Stock Units | Maximum
Method and assumptions on valuation of stock options
Contractual term (years)	6 years 3 months 18 days	6 years 3 months 18 days	4 years 3 months 18 days