STOCK-BASED COMPENSATION (Notes)

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

STOCK-BASED COMPENSATION

NOTE 10. STOCK-BASED COMPENSATION

During the three months ended March 31, 2014, we awarded certain employees grants of 664,844 shares of restricted stock and 39,592 restricted stock units ("RSUs"). The restricted stock awards will be expensed over the requisite service period, subject to an assumed 12% average forfeiture rate. The terms of the restricted stock awards include vesting provisions based solely on continued service. If the service criteria are satisfied, the restricted stock awards generally vest during March of 2015, 2016, and 2017.

During the three months ended March 31, 2014, we awarded an additional 207,233 RSUs that will vest based upon the total stockholder return (“TSR”) performance of our common stock over a three year period relative to companies included in published indices for the waste and disposal industry, the conventional electricity utilities industry and other similarly sized “mid-cap”companies (the “TSR Equity Awards”). We recognize compensation expense for the TSR Equity Awards based on the grant date fair value of the award which was determined using a Monte Carlo model.

Compensation expense related to our stock-based awards totaled $4 million and $5 million for the three months ended March 31, 2014 and 2013, respectively. Unrecognized stock-based compensation expense and weighted-average years to be recognized are as follows (in millions, except for weighted average years):

	As of March 31, 2014
	Unrecognized stock- based compensation	Weighted-average years     to be recognized
Restricted Stock Awards	$ 14	1.8
Restricted Stock Units	$ 5	2.3