Consolidated Statements of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Cash Flows From Operating Activities
Net Loss		$ (602)	$ (131)
Adjustments to Reconcile Net Loss to Net Cash Provided by Operating Activities
Depreciation, Depletion and Amortization		1,239	905
Asset Impairments		0	43
Dry Hole Cost		114	19
Gain on Extinguishment of Debt	[1]	(80)	0
Finalization of Purchase Price Allocation for Rosetta Merger	[2]	(25)	0
Loss on Asset Due to Terminated Contract	[3]	47	0
Deferred Income Tax Benefit		(414)	(312)
(Income) Loss from Equity Method Investees, Net of Dividends		(9)	4
Loss (Gain) on Commodity Derivative Instruments		107	(63)
Net Cash Received in Settlement of Commodity Derivative Instruments		322	397
Loss on Divestitures		23	0
Stock Based Compensation		40	38
Non-cash Pension Termination Expense		0	21
Other Adjustments for Noncash Items Included in Income		59	11
Changes in Operating Assets and Liabilities
(Increase) Decrease in Accounts Receivable		(6)	304
Decrease in Accounts Payable		(232)	(167)
Decrease in Current Income Taxes Payable		(51)	(63)
Other Current Assets and Liabilities, Net		(51)	(45)
Other Operating Assets and Liabilities, Net		(41)	5
Net Cash Provided by Operating Activities		440	966
Cash Flows From Investing Activities
Additions to Property, Plant and Equipment		(812)	(1,898)
Additions to Equity Method Investments		(6)	(65)
Proceeds from Divestitures and Other		767	151
Net Cash Used in Investing Activities		(51)	(1,812)
Cash Flows From Financing Activities
Dividends Paid, Common Stock		(86)	(134)
Proceeds from Issuance of Shares of Common Stock to Public, Net of Offering Costs		0	1,112
Proceeds from Term Loan Facility		1,400	0
Repayment of Senior Notes		(1,383)	0
Repayment of Capital Lease Obligation		(27)	(29)
Other		(21)	(8)
Net Cash (Used in) Provided by Financing Activities		(117)	941
Increase in Cash and Cash Equivalents		272	95
Cash and Cash Equivalents at Beginning of Period		1,028	1,183
Cash and Cash Equivalents at End of Period		$ 1,300	$ 1,278

[1] Amount relates to the tendering of senior notes assumed in the Rosetta Merger. See Note 6. Debt.

[2] Amount relates to an adjustment recorded to the purchase price allocation related to the Rosetta Merger. See Note 3. Rosetta Merger.

[3] Amount relates to the termination of a rig contract offshore Falkland Islands as a result of a supplier's non-performance. See Note 8. Capitalized Exploratory Well Costs and Undeveloped Leasehold and Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations - Executive Overview - Exploration Program Update