Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Measurements [Abstract]

Carrying Amount And Estimated Fair Values Of Financial Instruments

	September 30, 2014				December 31, 2013
	Carrying		Fair		Carrying		Fair
	Amount		Value		Amount		Value
	(in millions)
Cash and cash equivalents	$	20	$	20	$	23	$	23
Credit facility	$	139	$	139	$	283	$	283
Senior notes	$	1,668	$	1,957	$	1,668	$	1,796
Derivative instruments	$	78	$	78	$	39	$	39

Summary Assets And Liabilities Measured At Fair Value On Recurring Basis

	September 30, 2014
		(in millions)
	Fair Value Measurements Using:
	Quoted Prices		Significant
	in Active		Other		Significant
	Markets		Observable Inputs		Unobservable Inputs		Assets (Liabilities)
	(Level 1)		(Level 2)		(Level 3)		at Fair Value
Derivative assets	$	–	$	128	$	18	$	146
Derivative liabilities		–		(4)		(64)		(68)
Total	$	–	$	124	$	(46)	$	78
	December 31, 2013
		(in millions)
	Fair Value Measurements Using:
	Quoted Prices		Significant
	in Active		Other		Significant
	Markets		Observable Inputs		Unobservable Inputs		Assets (Liabilities)
	(Level 1)		(Level 2)		(Level 3)		at Fair Value
Derivative assets	$	–	$	66	$	13	$	79
Derivative liabilities		–		(8)		(32)		(40)
Total	$	–	$	58	$	(19)	$	39

Reconciliations For Change In Net Fair Value Of Derivative Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)

	For the three months ended				For the nine months ended
	September 30,				September 30,
	2014		2013		2014		2013
	(in millions)
Balance at beginning of period	$	(55)	$	(28)	$	(19)	$	–
Total gains (losses):
Included in earnings		18		5		(27)		(22)
Included in other comprehensive income		–		–		–		–
Purchases, issuances, and settlements:
Purchases		–		–		–		–
Issuances		–		–		–		–
Settlements		(9)		(2)		–		(3)
Transfers into/out of Level 3		–		–		–		–
Balance at end of period	$	(46)	$	(25)	$	(46)	$	(25)
Change in gains (losses) included in earnings relating to derivatives still held as of September 30	$	9	$	3	$	(27)	$	(25)