SHARE-BASED COMPENSATION (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Additional disclosures
Proceeds from exercise of stock options	$ 4,847,000	$ 4,474,000	$ 34,209,000	$ 7,272,000
Stock Options.
Stock option activity
Options outstanding at the beginning of the period (in shares)			12,203,000
Granted (in shares)			934,000
Equitable adjustment (in shares)			380,000
Exercised (in shares)			(2,158,000)
Expired or forfeited (in shares)			(459,000)
Options outstanding at the end of the period (in shares)	10,900,000		10,900,000
Options vested and exercisable at the end of the period (in shares)	4,795,000		4,795,000
Weighted-average exercise price
Options outstanding at the beginning of the period (in dollars per share)			$ 11.99
Granted (in dollars per share)	$ 47.75		$ 47.75
Equitable adjustment (in dollars per share)	$ 11.00		$ 11.00
Exercised (in dollars per share)	$ (15.20)		$ (15.20)
Expired or forfeited (in dollars per share)			$ (21.34)
Options outstanding at the end of the period (in dollars per share)	$ 13.79		$ 13.79
Options vested and exercisable at the end of the period (in dollars per share)	$ 6.70		$ 6.70
Weighted-Average Remaining Contractual Term (in years)
Options outstanding at the end of the period (in years)	6.1		6.1
Options vested and exercisable at the end of the period (in years)			5.5
Aggregate Intrinsic Value
Options outstanding at the end of the period	264,032,000		264,032,000
Options vested and exercisable at the end of the period	145,890,000		145,890,000
Additional disclosures
Weighted-average grant date fair value of stock options (in dollars per share)			$ 12.03
Intrinsic value of stock options exercised in the period			22,800,000
Proceeds from exercise of stock options			34,200,000
Unrecognized compensation expense
Remaining unrecognized compensation expense related to non-vested awards	52,300,000		52,300,000
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized (in years)			1.6
Time-Based RSUs
Unrecognized compensation expense
Remaining unrecognized compensation expense related to non-vested awards	23,200,000		23,200,000
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized (in years)			1.3
Time-Based RSUs, Performance-Based RSUs and Deferred Share Units
Stock Awards at the beginning of the period (in shares)			2,213,000
Granted (in shares)			228,000
Vested (in shares)			(287,000)
Forfeited (in shares)			(115,000)
Stock awards at the end of the period (in shares)	2,039,000		2,039,000
Weighted-average grant-date fair value
Stock awards at the beginning of the period (in dollars per share)			$ 24.61
Granted (in dollars per share)			$ 50.02
Vested (in dollars per share)			$ (17.63)
Forfeited (in dollars per share)	$ (19.42)		$ (19.42)
Stock awards at the end of the period (in dollars per share)	$ 28.72		$ 28.72
Performance-Based Restricted Stock Units
Unrecognized compensation expense
Remaining unrecognized compensation expense related to non-vested awards	31,800,000		31,800,000
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized (in years)			1.8
Time-Based RSUs, Performance-Based RSUs and Deferred Share Units
Stock Awards at the beginning of the period (in shares)			2,496,000
Granted (in shares)			219,000
Vested (in shares)			(751,000)
Forfeited (in shares)			(82,000)
Stock awards at the end of the period (in shares)	1,882,000		1,882,000
Weighted-average grant-date fair value
Stock awards at the beginning of the period (in dollars per share)			$ 33.25
Granted (in dollars per share)			$ 56.31
Vested (in dollars per share)			$ (52.72)
Forfeited (in dollars per share)	$ (17.82)		$ (17.82)
Stock awards at the end of the period (in dollars per share)	$ 28.85		$ 28.85
Deferred Share Units ("DSU")
Time-Based RSUs, Performance-Based RSUs and Deferred Share Units
Stock Awards at the beginning of the period (in shares)			382,000
Granted (in shares)			18,000
Settled for cash (in shares)			204,000
Stock awards at the end of the period (in shares)	196,000		196,000
Weighted-average grant-date fair value
Stock awards at the beginning of the period (in dollars per share)			$ 14.43
Granted (in dollars per share)			$ 39.79
Settled for cash (in dollars per share)	$ (15.09)		$ (15.09)
Stock awards at the end of the period (in dollars per share)	$ 16.06		$ 16.06
Liabilities reclassified from accrued liabilities to additional paid-in capital	$ 9,300,000		$ 9,300,000
Liabilities, DSU plan
Shares held by current directors from accrued liabilities to additional paid-in capital (in shares)			182,053
Number of shares held by former directors were not affected by the modification and continue to be cash settled (in shares)			64,294