Accounts Receivable (Tables) (USD $)
In Millions, unless otherwise specified

9 Months Ended

Sep. 30, 2014

Dec. 31, 2013

Accounts Notes And Loans Receivable [Line Items]

Accounts Receivable, Net, Current

$ 395

$ 474

Accounts Receivable

Accounts receivable consisted of the following:

	September 30,   2014			December 31,   2013
	(In millions)
Revenue	$	176		$	294
Joint interest	183			156
Other	37			25
Reserve for doubtful accounts	(1		)	(1		)
Total accounts receivable	$	395		$	474

Revenue [Member]

Accounts Notes And Loans Receivable [Line Items]

Accounts Receivable, Net, Current

176

294

Other accounts receivable [Member]

Accounts Notes And Loans Receivable [Line Items]

Accounts Receivable, Net, Current

37

25

Allowance For Doubtful Accounts [Member]

Accounts Notes And Loans Receivable [Line Items]

Accounts Receivable, Net, Current

(1)

(1)

Oil and Gas Joint Interest Billing [Member]

Accounts Notes And Loans Receivable [Line Items]

Accounts Receivable, Net, Current

$ 183

$ 156