Stock Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Granted Awards Activity

The Compensation Committee of our Board of Directors approved the grant of stock options, stock appreciation rights (SARs) and restricted stock units (RSUs) shown in the table below during the first nine months of 2013. 

		Weighted-average Per Share
	Granted (In millions)	Exercise Price		Grant Date Fair Value
Stock options	0.9	$	16.21	$	7.46
SARs	0.2	$	16.19	$	7.45
RSUs	0.5			$	16.28

Key Assumptions as Part of Black-Scholes Option Pricing Model

We estimated fair values for options and SARs granted during 2013 using the following key assumptions as part of the Black-Scholes option pricing model. The expected term was estimated using the simplified method because the limited period of time our common stock has been publicly traded provides insufficient historical exercise data. The risk-free rate was based on U.S. Treasury security yields at the time of grant. The dividend yield was calculated by dividing the expected annual dividend by the average stock price of our common stock over the prior year. The expected volatility was estimated using a combination of the historical volatility of similar entities and the implied volatility of our exchange-traded options. 

	Options		SARs
Expected term (in years)	6.00		6.00
Risk-free interest rate	1.07	%	1.07	%
Dividend yield	1.41	%	1.41	%
Expected volatility	55.80	%	55.80	%