Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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

Stock-Based Compensation [Table Text Block]

We recorded the following compensation expenses related to restricted stock and stock options during the Current Quarter and the Prior Quarter:

	Three Months Ended March 31,
	2014		2013
	($ in millions)
General and administrative expenses	$	12	$	20
Natural gas and oil properties	7		21
Natural gas, oil and NGL production expenses	4		6
Marketing, gathering and compression expenses	2		3
Oilfield services expenses	2		3
Total	$	27	$	53

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] [Table Text Block]

A summary of the changes in unvested shares of restricted stock during the Current Quarter is presented below.

	Number of Unvested Restricted Shares		Weighted Average Grant Date Fair Value
	(in thousands)
Unvested shares as of January 1, 2014	13,400		$	23.38
Granted	3,943		$	25.13
Vested	(2,350	)	$	26.41
Forfeited	(638	)	$	25.69
Unvested shares as of March 31, 2014	14,355		$	23.26

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The Company used the following assumptions to estimate the grant date fair value of the stock options granted in the Current Quarter:

Expected option life - years	6.0
Volatility	48.33	%
Risk-free interest rate	1.97	%
Dividend yield	1.36	%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table provides information related to stock option activity during the Current Quarter: 

	Number of Shares Underlying   Options		Weighted Average Exercise Price Per Share		Weighted   Average Contract Life in Years	Aggregate   Intrinsic Value(a)
	(in thousands)					($ in millions)
Outstanding at January 1, 2014	5,268		$	19.28	6.66	$	41
Granted	786		$	25.71
Exercised	(270	)	$	18.23		$	2
Expired	—		$	—
Outstanding at March 31, 2014	5,784		$	20.20	7.15	$	31
Exercisable at March 31, 2014	1,766		$	18.95	3.72	$	12

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(a) The intrinsic value of a stock option is the amount by which the current market value or the market value upon exercise of the underlying stock exceeds the exercise price of the option.

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

The following table presents a summary of our PSU awards as of March 31, 2014:

	Units	Fair Value as of Grant Date		Fair Value		Liability for Vested Amount
		($ in millions)
2012 Awards (a)
Payable 2015	834,248	$	23	$	21	$	21
2013 Awards
Payable 2016	1,600,438	$	35	$	52	$	45
2014 Awards
Payable 2017	620,669	$	17	$	16	$	4

___________________________________________

(a) In the Current Quarter and the Prior Quarter, we paid $11 million and $2 million, respectively, related to 2012 PSU awards.

Schedule of Share-based Compensation, PSU Units, Activity [Table Text Block]

We recorded the following compensation expenses related to PSUs during the Current Quarter and the Prior Quarter:

	Three Months Ended March 31,
	2014			2013
	($ in millions)
Natural gas and oil properties	$	1		$	4
General and administrative expenses	(1		)	5
Marketing, gathering and compression expenses	—			2
Total	$	—		$	11