XML 81 R64.htm IDEA: XBRL DOCUMENT v2.4.0.6
UNIT-BASED COMPENSATION PLANS (Activity of the awards granted to employees and non-employee directors) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Deferred Compensation Arrangements [Abstract]  
Unvested awards as of December 31, 2010 , Number of Units 1,936,578
Awards granted, Number of Units 1,386,251
Awards vested, Number of Units (610,557)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (148,563)
Unvested awards as of December 31, 2011, Number of Units 2,563,709
Unvested awards as of December 31, 2010, Weighted Average Grant-Date Fair Value Per Unit $ 43.95
Awards granted, Weighted Average Grant-Date Fair Value Per Unit $ 48.35
Awards vested, Weighted Average Grant-Date Fair Value Per Unit $ 44.07
Awards forfeited, Weighted Average Grant-Date Fair Value Per Unit $ 42.74
Unvested awards as of December 31, 2011, Weighted Average Grant-Date Fair Value Per Unit $ 46.37