Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 95	$ 88	$ 76	$ 39
Restricted Cash and Cash Equivalents, Current	90	0
Accounts receivable	474	452
Inventories	163	132
Derivative assets	0	125
Deferred Tax Assets, Net, Current	22	0
Other current assets	57	69
Total current assets	901	866
Property, Plant and Equipment, Gross	16,650	14,346
Less - accumulated depreciation, depletion and amortization	8,375	7,444
Property, Plant and Equipment, Net	8,275	6,902
Derivative assets	26	17
Long-term investments	63	58
Deferred taxes	19	24
Other assets	37	45
Total assets	9,321	7,912
Current liabilities:
Accounts payable	76	69
Accrued liabilities	978	801
Deposit Liability, Current	90	0
Advances from joint owners	30	31
Asset retirement obligations	54	10
Derivative liabilities	62	6
Deferred taxes	0	42
Total current liabilities	1,290	959
Other liabilities	38	47
Derivative liabilities	0	15
Long-term debt	3,694	3,045
Asset retirement obligations	201	132
Deferred taxes	1,142	934
Total long-term liabilities	5,075	4,173
Commitments and contingencies	0	0
Stockholders' equity:
Preferred stock ($0.01 par value, 5,000,000 shares authorized; no shares issued)	0	0
Common stock ($0.01 par value)	1	1	1	1
Additional Paid in Capital	1,539	1,522	1,495	1,450
Treasury stock (at cost)	(13)	(36)	(50)	(41)
Accumulated other comprehensive loss	2	(7)	(10)	(12)
Retained earnings	1,427	1,300	2,484	1,945
Total stockholders' equity	2,956	2,780	3,920	3,343
Total liabilities and stockholders' equity	$ 9,321	$ 7,912