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Stock-Based Compensation
 3 Months Ended
Mar. 31, 2013
Stock-Based Compensation  
Stock-Based Compensation
11. STOCK-BASED COMPENSATION

Three Months Ended
March 31,
2013
2012
(millions)
Total stock-based compensation costs:
Restricted stock and restricted stock units
$ 0.9 $ 1.2
Stock options, performance awards and other
0.1 0.3
Expense included in selling, general and administrative and advanced technology costs
 $ 1.0 $ 1.5
Total recognized tax benefit
$ - $ -

The total recognized tax benefit is reported at the federal statutory rate net of the tax valuation allowance.

Stock-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized over the requisite service period, which is either immediate recognition if the employee is eligible to retire, or on a straight-line basis until the earlier of either the date of retirement eligibility or the end of the vesting period. There was no stock-based compensation granted in the three months ended March 31, 2013. As of March 31, 2013, there was $1.8 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to non-vested restricted shares and restricted stock units granted. That cost is expected to be recognized over a weighted-average period of 1.5 years.

On January 10, 2013 the Compensation Committee of the Board of Directors approved the surrender and cancellation of 2,462,726 unexercised stock options and suspended the Annual Incentive Program and Long Term Incentive Program for 2013 under the USEC Inc. 2009 Equity Incentive Plan.