Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Stock-Based Compensation [Abstract]

Schedule Of Employee Stock-Based Compensation Costs

	For the three months ended				For the six months ended
	June 30,				June 30,
	2014		2013		2014		2013
	(in millions)
Stock-based compensation cost – expensed	$	4	$	3	$	9	$	6
Stock-based compensation cost – capitalized	$	4	$	3	$	9	$	6

Summary Of Stock Option Activity

		Weighted
		Average
	Number	Exercise
	of Options	Price
	(in thousands)
Outstanding at December 31, 2013	3,313	$	35.70
Granted	90		46.55
Exercised	(269)		32.23
Forfeited or expired	(64)		38.45
Outstanding at June 30, 2014	3,070		36.26
Exercisable at June 30, 2014	1,851	$	35.35

Summary Of Restricted Stock Activity

		Weighted
		Average
	Number	Grant Date
	of Shares	Fair Value
	(in thousands)
Unvested shares at December 31, 2013	1,771	$	37.55
Granted	22		46.05
Vested	(15)		36.48
Forfeited	(67)		37.94
Unvested shares at June 30, 2014	1,711	$	37.65

Summary Of Performance Unit Activity

		Weighted
		Average
	Number	Grant Date
	of Units	Fair Value
	(in thousands)
Unvested units at December 31, 2013	–	$	–
Granted	359		40.44
Vested	–		–
Forfeited	–		–
Unvested units at June 30, 2014	359	$	40.44