Stock Options and Other Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock Options and Other Stock Based Compensation

Summary of option activity

				Weighted
		Weighted		Average
		Average		Remaining
	Number of	Exercise		Contractual	Aggregate
	Shares	Price		Term	Intrinsic
	(thousands)	(per share)		(years)	Value
Options outstanding at January 1, 2015	2,421	$	26.83
Granted	688		23.61
Exercised	(56)		13.04
Forfeited or expired	(432)		42.84
Options outstanding at  December 31, 2015	2,621		23.64	3.3	$	4
Options vested or expected to vest at  December 31, 2015	2,566	$	23.60	3.2	$	4
Options exercisable at  December 31, 2015	1,563	$	22.16	1.8	$	4

Additional information related to stock options

	2015		2014		2013
Weighted average grant-date fair value of options granted (per share)	$	7.79	$	13.17	$	12.39
Aggregate intrinsic value of options exercised	$	—	$	3	$	16
Aggregate cash received from options exercised	$	1	$	5	$	24

Schedule of weighted average assumptions used to estimate the fair value of each option grant on the date of grant using the Black-Scholes option pricing model

	2015		2014		2013
Expected life of options (years)	5.00		5.00		5.00
Expected stock price volatility	34.5	%	43.0	%	55.3	%
Risk-free interest rate	1.7	%	1.6	%	0.9	%
Expected dividend yield	0.0	%	0.0	%	0.0	%

Restricted shares and restricted share units activity

		Weighted
	Number of	Average
	Restricted	Grant-Date
	Shares	Fair Value
	(thousands)	(per share)
Nonvested at January 1, 2015	487	$	27.25
Granted	550		22.69
Vested	(177)		29.12
Forfeited	(188)		25.17
Nonvested at December 31, 2015	672		23.60
Awards granted during 2014		$	33.36
Awards granted during 2013		$	26.49

	2015		2014		2013
Total fair value of shares vested	$	4	$	5	$	5

Performance vested restricted share unit activity

	Number of Performance	Weighted Average
	Vested Restricted Shares	Grant-Date Fair Value
	Units (thousands)	(per unit)
Nonvested at January 1, 2015	903	$	26.94
Granted	454		23.63
Vested	(331)		22.60
Forfeited/Cancelled	(93)		27.52
Nonvested at December 31, 2015	933		26.81
Awards granted during 2014		$	33.41
Awards granted during 2013		$	26.10