Share-Based Payments (Tables)

12 Months Ended

Dec. 31, 2015

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

Schedule of Weighted-Average Assumptions Used to Determine Fair Value of Stock Options

The fair values of the options granted during the years ended December 31, 2015, 2014, and 2013 have been estimated at the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions:

	For the Year Ended December 31,
	2015		2014		2013
Expected volatility	39.5	%	40.3	%	41.8	%
Risk-free interest rate	1.9	%	2.2	%	1.4	%
Expected life (years)	7.7		7.2		7.2
Dividend yield	2.1	%	2.1	%	0.0	%

Schedule of Stock Option Activity

A summary of our stock option activity and related information is as follows:

	Shares (In Thousands)		Weighted- Average Exercise Price per Share		Weighted- Average Remaining Life (Years)	Aggregate Intrinsic Value (In Millions)
Outstanding, December 31, 2014	2,207		$	20.85
Granted	108		43.14
Exercised	(257	)	26.06
Forfeitures	(2	)	24.85
Expirations	—		—
Outstanding, December 31, 2015	2,056		21.37		4.1	$	28.5
Exercisable, December 31, 2015	1,811		19.47		3.5	27.8

Schedule of Restricted Stock Activity

A summary of our issued restricted stock awards is as follows (share information in thousands):

	Shares		Weighted-Average Grant Date Fair Value
Nonvested shares at December 31, 2014	1,197		$	23.31
Granted	689		27.86
Vested	(1,005	)	22.18
Forfeited	(39	)	30.03
Nonvested shares at December 31, 2015	842		28.05